326 lines
18 KiB
JSON
326 lines
18 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-82759",
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"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
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"state": "PUBLISHED",
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"assignerShortName": "EEF",
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"dateReserved": "2026-08-31T01:00:10.817Z",
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"datePublished": "2026-09-17T13:08:21.929Z",
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"dateUpdated": "2026-09-17T18:19:18.209Z"
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},
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"containers": {
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"cna": {
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"affected": [
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{
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"collectionURL": "https://repo.hex.pm",
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"cpes": [
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"cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"'Elixir.AshAuthentication.AddOn.AuditLog.IpPrivacy'"
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],
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"packageName": "ash_authentication",
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"packageURL": "pkg:hex/ash_authentication",
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"product": "ash_authentication",
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"programFiles": [
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"lib/ash_authentication/add_ons/audit_log/ip_privacy.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.AshAuthentication.AddOn.AuditLog.IpPrivacy':hash_ip/1"
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},
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{
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"name": "'Elixir.AshAuthentication.AddOn.AuditLog.IpPrivacy':apply_privacy/3"
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}
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],
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"repo": "https://github.com/team-alembic/ash_authentication",
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"vendor": "team-alembic",
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"versions": [
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{
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"lessThan": "4.15.0",
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"status": "affected",
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"version": "4.12.0",
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"versionType": "semver"
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},
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{
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"lessThan": "5.0.0-rc.14",
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"status": "affected",
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"version": "5.0.0-rc.0",
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"versionType": "semver"
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}
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]
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},
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{
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"collectionURL": "https://github.com",
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"cpes": [
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"cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"'Elixir.AshAuthentication.AddOn.AuditLog.IpPrivacy'"
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],
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"packageName": "team-alembic/ash_authentication",
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"packageURL": "pkg:github/team-alembic/ash_authentication",
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"product": "ash_authentication",
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"programFiles": [
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"lib/ash_authentication/add_ons/audit_log/ip_privacy.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.AshAuthentication.AddOn.AuditLog.IpPrivacy':hash_ip/1"
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},
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{
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"name": "'Elixir.AshAuthentication.AddOn.AuditLog.IpPrivacy':apply_privacy/3"
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}
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],
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"repo": "https://github.com/team-alembic/ash_authentication",
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"vendor": "team-alembic",
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"versions": [
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{
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"changes": [
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{
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"at": "d8a9c4b6bde828fdc8346198d5e4f588b5937541",
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"status": "unaffected"
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},
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{
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"at": "c3a6d5fe0d4fd383ea81b0402db0a96638479478",
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"status": "unaffected"
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}
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],
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"lessThan": "*",
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"status": "affected",
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"version": "255cfc9c0e511b7e0de39f8b3d676ae994fae06c",
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"versionType": "git"
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}
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]
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}
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],
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"configurations": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "<p>Only applications that enable the <code>audit_log</code> add-on and set its <code>ip_privacy</code> mode to <code>:hash</code> store the affected value. Other modes (<code>:none</code>, <code>:truncate</code>, <code>:exclude</code>) do not reach <code>hash_ip/1</code>.</p>\n<p>The complete break additionally requires the default salt, that is neither <code>:audit_log_ip_salt</code> nor <code>:secret</code> configured under the <code>:ash_authentication</code> application. This is the out-of-the-box state: no warning or error is raised when the hardcoded salt is in use.</p>"
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},
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{
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"base64": false,
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"type": "text/markdown",
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"value": "Only applications that enable the `audit_log` add-on and set its `ip_privacy` mode to `:hash` store the affected value. Other modes (`:none`, `:truncate`, `:exclude`) do not reach `hash_ip/1`.\n\nThe complete break additionally requires the default salt, that is neither `:audit_log_ip_salt` nor `:secret` configured under the `:ash_authentication` application. This is the out-of-the-box state: no warning or error is raised when the hardcoded salt is in use."
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}
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],
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"value": "Only applications that enable the audit_log add-on and set its ip_privacy mode to :hash store the affected value. Other modes (:none, :truncate, :exclude) do not reach hash_ip/1.\n\nThe complete break additionally requires the default salt, that is neither :audit_log_ip_salt nor :secret configured under the :ash_authentication application. This is the out-of-the-box state: no warning or error is raised when the hardcoded salt is in use."
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"cpeMatch": [
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{
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"criteria": "cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "4.15.0",
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"versionStartIncluding": "4.12.0",
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"vulnerable": true
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},
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{
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"criteria": "cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "5.0.0-rc.14",
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"versionStartIncluding": "5.0.0-rc.0",
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"vulnerable": true
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}
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],
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"negate": false,
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"operator": "OR"
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}
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],
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"operator": "AND"
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}
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],
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"credits": [
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{
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"lang": "en",
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"type": "analyst",
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"value": "Jonatan Männchen / EEF"
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},
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{
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"lang": "en",
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"type": "remediation developer",
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"value": "James Harton"
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},
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{
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"lang": "en",
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"type": "reporter",
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"value": "Peter Ullrich"
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}
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],
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"dateAssigned": "2026-09-11T17:53:27.000Z",
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"descriptions": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "<p>Use of a One-Way Hash with a Predictable Salt vulnerability in team-alembic AshAuthentication allows readers of the audit store to recover the client IP addresses that the audit log add-on's <code>:hash</code> privacy mode is meant to pseudonymise.</p>\n<p><code>AshAuthentication.AddOn.AuditLog.IpPrivacy.hash_ip/1</code> computes a single unkeyed <code>:crypto.hash(:sha256, salt <> ip)</code> and truncates the result to 16 hexadecimal characters. The salt is read from the <code>:audit_log_ip_salt</code> or <code>:secret</code> application config keys, and falls back to the constant <code>\"default-salt-change-in-production\"</code> published in the library source when neither is set, with nothing warning that the default is in use. The IPv4 space is only 2^32 values and SHA-256 is fast, so the whole hash table is precomputable and every stored value maps back to its source address. Truncating to 16 characters does not help, and even a configured salt leaves the hash cheap enough to enumerate once it leaks.</p>\n<p>This issue affects ash_authentication: from 4.12.0 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14.</p>"
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},
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{
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"base64": false,
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"type": "text/markdown",
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"value": "Use of a One-Way Hash with a Predictable Salt vulnerability in team-alembic AshAuthentication allows readers of the audit store to recover the client IP addresses that the audit log add-on's `:hash` privacy mode is meant to pseudonymise.\n\n`AshAuthentication.AddOn.AuditLog.IpPrivacy.hash_ip/1` computes a single unkeyed `:crypto.hash(:sha256, salt <> ip)` and truncates the result to 16 hexadecimal characters. The salt is read from the `:audit_log_ip_salt` or `:secret` application config keys, and falls back to the constant `\"default-salt-change-in-production\"` published in the library source when neither is set, with nothing warning that the default is in use. The IPv4 space is only 2^32 values and SHA-256 is fast, so the whole hash table is precomputable and every stored value maps back to its source address. Truncating to 16 characters does not help, and even a configured salt leaves the hash cheap enough to enumerate once it leaks.\n\nThis issue affects ash_authentication: from 4.12.0 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14."
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}
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],
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"value": "Use of a One-Way Hash with a Predictable Salt vulnerability in team-alembic AshAuthentication allows readers of the audit store to recover the client IP addresses that the audit log add-on's :hash privacy mode is meant to pseudonymise.\n\nAshAuthentication.AddOn.AuditLog.IpPrivacy.hash_ip/1 computes a single unkeyed :crypto.hash(:sha256, salt <> ip) and truncates the result to 16 hexadecimal characters. The salt is read from the :audit_log_ip_salt or :secret application config keys, and falls back to the constant \"default-salt-change-in-production\" published in the library source when neither is set, with nothing warning that the default is in use. The IPv4 space is only 2^32 values and SHA-256 is fast, so the whole hash table is precomputable and every stored value maps back to its source address. Truncating to 16 characters does not help, and even a configured salt leaves the hash cheap enough to enumerate once it leaks.\n\nThis issue affects ash_authentication: from 4.12.0 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14."
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}
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],
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"impacts": [
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{
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"capecId": "CAPEC-112",
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"descriptions": [
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{
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"lang": "en",
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"value": "CAPEC-112 Brute Force"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV4_0": {
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"Automatable": "NOT_DEFINED",
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"Recovery": "NOT_DEFINED",
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"Safety": "NOT_DEFINED",
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"attackComplexity": "LOW",
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"attackRequirements": "PRESENT",
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"attackVector": "LOCAL",
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"baseScore": 1.8,
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"baseSeverity": "LOW",
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"privilegesRequired": "HIGH",
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"providerUrgency": "NOT_DEFINED",
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"subAvailabilityImpact": "NONE",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"userInteraction": "NONE",
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"valueDensity": "NOT_DEFINED",
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"vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
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"version": "4.0",
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"vulnAvailabilityImpact": "NONE",
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"vulnConfidentialityImpact": "LOW",
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"vulnIntegrityImpact": "NONE",
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"vulnerabilityResponseEffort": "NOT_DEFINED"
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},
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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]
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-760",
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"description": "CWE-760 Use of a One-Way Hash with a Predictable Salt",
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"lang": "en",
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"type": "CWE"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
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"shortName": "EEF",
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"dateUpdated": "2026-09-17T13:08:21.929Z"
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},
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"references": [
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{
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"tags": [
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"related",
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"vendor-advisory"
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],
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"url": "https://github.com/team-alembic/ash_authentication/security/advisories/GHSA-cgqj-pcpq-xhfm"
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},
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{
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"name": "EEF CNA record for CVE-2026-82759",
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"tags": [
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"related"
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],
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"url": "https://cna.erlef.org/cves/CVE-2026-82759.html"
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},
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{
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"name": "OSV record EEF-CVE-2026-82759",
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"tags": [
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"related"
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],
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"url": "https://osv.dev/vulnerability/EEF-CVE-2026-82759"
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},
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{
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"name": "Introducing commit 255cfc9 in team-alembic/ash_authentication",
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"tags": [
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"related"
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],
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"url": "https://github.com/team-alembic/ash_authentication/commit/255cfc9c0e511b7e0de39f8b3d676ae994fae06c"
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},
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{
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"name": "Fix commit d8a9c4b in team-alembic/ash_authentication",
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"tags": [
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"patch"
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],
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"url": "https://github.com/team-alembic/ash_authentication/commit/d8a9c4b6bde828fdc8346198d5e4f588b5937541"
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},
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{
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"name": "Fix commit c3a6d5f in team-alembic/ash_authentication",
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"tags": [
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"patch"
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],
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"url": "https://github.com/team-alembic/ash_authentication/commit/c3a6d5fe0d4fd383ea81b0402db0a96638479478"
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}
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],
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"source": {
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"discovery": "INTERNAL"
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},
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"title": "Reversible IP address pseudonymisation in AshAuthentication audit log hash mode"
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-09-17T18:19:03.885925Z",
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"id": "CVE-2026-82759",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-09-17T18:19:18.209Z"
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}
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}
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]
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}
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} |