273 lines
13 KiB
JSON
273 lines
13 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-2026-77972",
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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": "2026-08-24T15:45:02.127Z",
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"datePublished": "2026-09-15T15:37:49.948Z",
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"dateUpdated": "2026-09-21T18:44:16.787Z"
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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:slab:safeurl:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"'Elixir.SafeURL'",
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"'Elixir.SafeURL.HTTPoison'",
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"'Elixir.SafeURL.TeslaMiddleware'"
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],
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"packageName": "safeurl",
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"packageURL": "pkg:hex/safeurl",
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"product": "safeurl",
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"programFiles": [
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"lib/safeurl/safeurl.ex",
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"lib/safeurl/httpoison.ex",
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"lib/safeurl/tesla_middleware.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.SafeURL':validate/2"
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},
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{
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"name": "'Elixir.SafeURL.HTTPoison':get/3"
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},
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{
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"name": "'Elixir.SafeURL.TeslaMiddleware':call/3"
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}
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],
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"repo": "https://github.com/slab/safeurl-elixir",
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"vendor": "Slab",
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"versions": [
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{
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"lessThan": "*",
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"status": "affected",
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"version": "0.1.0",
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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:slab:safeurl:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"'Elixir.SafeURL'",
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"'Elixir.SafeURL.HTTPoison'",
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"'Elixir.SafeURL.TeslaMiddleware'"
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],
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"packageName": "slab/safeurl-elixir",
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"packageURL": "pkg:github/slab/safeurl-elixir",
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"product": "safeurl",
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"programFiles": [
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"lib/safeurl/safeurl.ex",
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"lib/safeurl/httpoison.ex",
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"lib/safeurl/tesla_middleware.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.SafeURL':validate/2"
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},
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{
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"name": "'Elixir.SafeURL.HTTPoison':get/3"
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},
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{
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"name": "'Elixir.SafeURL.TeslaMiddleware':call/3"
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}
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],
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"repo": "https://github.com/slab/safeurl-elixir",
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"vendor": "Slab",
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"versions": [
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{
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"lessThan": "*",
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"status": "affected",
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"version": "feabbd0a13f83028ab24b71710526e9da9841f70",
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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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"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:slab:safeurl:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "0.1.0",
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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": "reporter",
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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": "coordinator",
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"value": "Jonatan Männchen / EEF"
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}
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],
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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>Time-of-check Time-of-use (TOCTOU) Race Condition in Slab safeurl allows an attacker who controls a hostname's DNS responses to reach internal network destinations that validation rejected.</p>\n<p>Validation returns a verdict and not the address it approved, so the HTTP clients the library ships receive the original hostname and resolve it a second time when the request is made. An attacker who controls the authoritative DNS for a name can answer the first lookup with a permitted address and the second with a blocked one, and the request then reaches a destination validation never approved. The same window opens without an attacker whenever a name legitimately resolves to different addresses across lookups, such as short record lifetimes or rotation between several addresses.</p>\n<p>This issue affects safeurl: from 0.1.0 onward.</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": "Time-of-check Time-of-use (TOCTOU) Race Condition in Slab safeurl allows an attacker who controls a hostname's DNS responses to reach internal network destinations that validation rejected.\n\nValidation returns a verdict and not the address it approved, so the HTTP clients the library ships receive the original hostname and resolve it a second time when the request is made. An attacker who controls the authoritative DNS for a name can answer the first lookup with a permitted address and the second with a blocked one, and the request then reaches a destination validation never approved. The same window opens without an attacker whenever a name legitimately resolves to different addresses across lookups, such as short record lifetimes or rotation between several addresses.\n\nThis issue affects safeurl: from 0.1.0 onward."
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}
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],
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"value": "Time-of-check Time-of-use (TOCTOU) Race Condition in Slab safeurl allows an attacker who controls a hostname's DNS responses to reach internal network destinations that validation rejected.\n\nValidation returns a verdict and not the address it approved, so the HTTP clients the library ships receive the original hostname and resolve it a second time when the request is made. An attacker who controls the authoritative DNS for a name can answer the first lookup with a permitted address and the second with a blocked one, and the request then reaches a destination validation never approved. The same window opens without an attacker whenever a name legitimately resolves to different addresses across lookups, such as short record lifetimes or rotation between several addresses.\n\nThis issue affects safeurl: from 0.1.0 onward."
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}
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],
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"impacts": [
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{
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"capecId": "CAPEC-664",
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"descriptions": [
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{
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"lang": "en",
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"value": "CAPEC-664 Server Side Request Forgery"
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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": "HIGH",
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"attackRequirements": "PRESENT",
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"attackVector": "NETWORK",
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"baseScore": 9,
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"baseSeverity": "CRITICAL",
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"privilegesRequired": "NONE",
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"providerUrgency": "NOT_DEFINED",
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"subAvailabilityImpact": "NONE",
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"subConfidentialityImpact": "HIGH",
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"subIntegrityImpact": "LOW",
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"userInteraction": "NONE",
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"valueDensity": "NOT_DEFINED",
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"vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N",
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"version": "4.0",
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"vulnAvailabilityImpact": "NONE",
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"vulnConfidentialityImpact": "HIGH",
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"vulnIntegrityImpact": "LOW",
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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-367",
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"description": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition",
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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": "2026-09-15T15:37:49.948Z"
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},
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"references": [
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{
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"name": "EEF CNA record for CVE-2026-77972",
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"tags": [
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"related",
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"third-party-advisory"
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],
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"url": "https://cna.erlef.org/cves/CVE-2026-77972.html"
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},
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{
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"name": "OSV record EEF-CVE-2026-77972",
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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-2026-77972"
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},
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{
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"name": "Introducing commit feabbd0 in slab/safeurl-elixir",
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"tags": [
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"related"
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],
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"url": "https://github.com/slab/safeurl-elixir/commit/feabbd0a13f83028ab24b71710526e9da9841f70"
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}
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],
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"source": {
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"discovery": "EXTERNAL"
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},
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"title": "safeurl validated address is not bound to the request, allowing DNS rebinding"
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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": "2026-09-21T18:44:04.900610Z",
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"id": "CVE-2026-77972",
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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": "2026-09-21T18:44:16.787Z"
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}
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}
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]
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}
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} |