261 lines
12 KiB
JSON
261 lines
12 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-2026-43972",
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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": "2026-05-04T18:23:25.574Z",
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"datePublished": "2026-06-08T14:12:38.780Z",
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"dateUpdated": "2026-06-08T16:34:45.350Z"
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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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"cpes": [
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"cpe:2.3:a:ninenines:gun:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"gun_http2"
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],
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"packageName": "gun",
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"packageURL": "pkg:hex/gun",
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"product": "gun",
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"programFiles": [
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"src/gun_http2.erl"
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],
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"programRoutines": [
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{
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"name": "gun_http2:push_promise_frame/7"
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},
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{
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"name": "gun_http2:headers_frame/9"
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}
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],
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"repo": "https://github.com/ninenines/gun",
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"vendor": "ninenines",
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"versions": [
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{
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"lessThan": "2.4.0",
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"status": "affected",
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"version": "2.0.0",
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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:ninenines:gun:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"gun_http2"
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],
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"packageName": "ninenines/gun",
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"packageURL": "pkg:github/ninenines/gun",
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"product": "gun",
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"programFiles": [
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"src/gun_http2.erl"
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],
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"programRoutines": [
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{
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"name": "gun_http2:push_promise_frame/7"
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},
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{
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"name": "gun_http2:headers_frame/9"
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}
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],
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"repo": "https://github.com/ninenines/gun.git",
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"vendor": "ninenines",
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"versions": [
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{
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"lessThan": "567863ff53802fed21c3b3f25812db7f7ae29676",
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"status": "affected",
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"version": "871989eef53663285c165fdfb83a5918ebe00d41",
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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>The vulnerability is exploitable only when gun is configured with a <tt>cookie_store</tt> and connects to an HTTP/2 server with server push enabled.</p>"
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}
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],
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"value": "The vulnerability is exploitable only when gun is configured with a cookie_store and connects to an HTTP/2 server with server push enabled."
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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:ninenines:gun:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "2.4.0",
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"versionStartIncluding": "2.0.0",
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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": "finder",
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"value": "Peter Ullrich"
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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": "Loïc Hoguin"
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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": "Origin Validation Error vulnerability in ninenines gun (<tt>gun_http2</tt> module) allows cross-origin cookie injection via unvalidated HTTP/2 PUSH_PROMISE authority.<p>In <tt>gun_http2:push_promise_frame/7</tt>, the <tt>:authority</tt> pseudo-header from an incoming PUSH_PROMISE frame is stored verbatim into the promised stream record without checking that it matches the connection's origin. When <tt>gun_http2:headers_frame/9</tt> later processes the response headers for the promised stream, it calls <tt>gun_cookies:set_cookie_header/7</tt> with the unvalidated server-supplied authority before any status branching and before user code can act. This violates RFC 7540 §10.6 / RFC 9113 §8.4, which require receivers to treat as a protocol error any push for a resource the server is not authoritative for.</p><p>A malicious or compromised HTTP/2 server can plant cookies scoped to arbitrary third-party domains into the client's shared cookie store. This enables session fixation attacks against those domains and, if the planted cookie overrides a legitimate session token, may result in account takeover. No user interaction beyond making a normal HTTP/2 request to the attacker-controlled server is required.</p><p>This issue affects gun: from 2.0.0 before 2.4.0.</p>"
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}
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],
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"value": "Origin Validation Error vulnerability in ninenines gun (gun_http2 module) allows cross-origin cookie injection via unvalidated HTTP/2 PUSH_PROMISE authority.\n\nIn gun_http2:push_promise_frame/7, the :authority pseudo-header from an incoming PUSH_PROMISE frame is stored verbatim into the promised stream record without checking that it matches the connection's origin. When gun_http2:headers_frame/9 later processes the response headers for the promised stream, it calls gun_cookies:set_cookie_header/7 with the unvalidated server-supplied authority before any status branching and before user code can act. This violates RFC 7540 §10.6 / RFC 9113 §8.4, which require receivers to treat as a protocol error any push for a resource the server is not authoritative for.\n\nA malicious or compromised HTTP/2 server can plant cookies scoped to arbitrary third-party domains into the client's shared cookie store. This enables session fixation attacks against those domains and, if the planted cookie overrides a legitimate session token, may result in account takeover. No user interaction beyond making a normal HTTP/2 request to the attacker-controlled server is required.\n\nThis issue affects gun: from 2.0.0 before 2.4.0."
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}
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],
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"impacts": [
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{
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"capecId": "CAPEC-61",
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"descriptions": [
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{
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"lang": "en",
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"value": "CAPEC-61 Session Fixation"
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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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"attackComplexity": "LOW",
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"attackRequirements": "PRESENT",
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"attackVector": "NETWORK",
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"baseScore": 6.3,
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"baseSeverity": "MEDIUM",
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"privilegesRequired": "NONE",
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"subAvailabilityImpact": "NONE",
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"subConfidentialityImpact": "LOW",
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"subIntegrityImpact": "LOW",
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"userInteraction": "NONE",
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N",
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"version": "4.0",
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"vulnAvailabilityImpact": "NONE",
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"vulnConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "LOW"
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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-346",
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"description": "CWE-346 Origin Validation Error",
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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": "2026-06-08T16:34:45.350Z"
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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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"third-party-advisory"
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],
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"url": "https://cna.erlef.org/cves/CVE-2026-43972.html"
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},
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{
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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-2026-43972"
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},
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{
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"tags": [
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"patch"
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],
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"url": "https://github.com/ninenines/gun/commit/567863ff53802fed21c3b3f25812db7f7ae29676"
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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": "gun HTTP/2 PUSH_PROMISE authority not validated against connection origin allows cross-origin cookie injection",
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"x_generator": {
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"engine": "cvelib 1.8.0"
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}
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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": "2026-06-08T15:42:59.352280Z",
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"id": "CVE-2026-43972",
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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": "2026-06-08T15:43:06.577Z"
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}
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}
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]
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}
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} |