175 lines
8.2 KiB
JSON
175 lines
8.2 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-2026-8674",
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"assignerOrgId": "3ff69d7a-14f2-4f67-a097-88dee7810d18",
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"state": "PUBLISHED",
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"assignerShortName": "glibc",
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"dateReserved": "2026-05-15T12:15:59.229Z",
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"datePublished": "2026-09-17T16:54:27.310Z",
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"dateUpdated": "2026-09-17T18:09:16.072Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "3ff69d7a-14f2-4f67-a097-88dee7810d18",
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"shortName": "glibc",
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"dateUpdated": "2026-09-17T16:54:27.310Z"
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},
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"title": "Assertion failure in the DNS stub resolver with a long search domain",
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"datePublic": "2023-11-07T05:00:00.000Z",
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"cweId": "CWE-617",
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"description": "CWE-617 Reachable Assertion",
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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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"affected": [
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{
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"vendor": "The GNU C Library",
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"product": "glibc",
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"versions": [
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{
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"status": "affected",
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"version": "2.26",
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"lessThanOrEqual": "2.44",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unaffected"
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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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"value": "Initializing the DNS stub resolver from an /etc/resolv.conf file, or a LOCALDOMAIN environment variable, whose search list contains a domain of roughly 200 characters or more in the GNU C Library version 2.26 to 2.44 results in an assertion failure which aborts the process.\n\nThe resolver truncates the search list when copying it into the fixed-size _res.defdname buffer, then asserts that the copy is consistent with the full configuration. The consistency check compared against the wrong size and did not handle a first entry that does not fit, so a correctly truncated list failed the assertion. Any process that resolves names through the library is affected, including long-running processes that reload /etc/resolv.conf on the next query after it changes. Search domains are commonly written to /etc/resolv.conf from data received over DHCP or from a VPN server, so an attacker on the local network may be able to trigger this without privileges on the target system, subject to validation by the network configuration software.",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"value": "Initializing the DNS stub resolver from an /etc/resolv.conf file, or a LOCALDOMAIN environment variable, whose search list contains a domain of roughly 200 characters or more in the GNU C Library version 2.26 to 2.44 results in an assertion failure which aborts the process.<br><br>The resolver truncates the search list when copying it into the fixed-size _res.defdname buffer, then asserts that the copy is consistent with the full configuration. The consistency check compared against the wrong size and did not handle a first entry that does not fit, so a correctly truncated list failed the assertion. Any process that resolves names through the library is affected, including long-running processes that reload /etc/resolv.conf on the next query after it changes. Search domains are commonly written to /etc/resolv.conf from data received over DHCP or from a VPN server, so an attacker on the local network may be able to trigger this without privileges on the target system, subject to validation by the network configuration software."
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}
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]
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}
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],
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"references": [
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{
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"url": "https://sourceware.org/bugzilla/show_bug.cgi?id=31026",
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"tags": [
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"issue-tracking"
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]
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},
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{
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"url": "https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=advisories/GLIBC-SA-2026-0021",
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"tags": [
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"vendor-advisory"
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]
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},
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{
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"url": "https://sourceware.org/git/?p=glibc.git;a=commit;h=506ea57086bfb9ce3daff1c14246a1cb532aba0a",
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"tags": [
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"patch"
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]
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},
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{
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"url": "https://joshua.hu/fuzzing-glibc-libresolv",
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"tags": [
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"technical-description"
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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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"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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"cvssV3_1": {
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"version": "3.1",
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"attackVector": "ADJACENT_NETWORK",
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"attackComplexity": "HIGH",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"scope": "UNCHANGED",
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"confidentialityImpact": "NONE",
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"integrityImpact": "NONE",
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"availabilityImpact": "HIGH",
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"baseSeverity": "MEDIUM",
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"baseScore": 5.3,
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"vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
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}
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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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"value": "Joshua Rogers",
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"type": "finder"
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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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"x_generator": {
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"engine": "Vulnogram 1.0.5"
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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": "2026-09-17T18:05:54.714741Z",
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"id": "CVE-2026-8674",
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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": "2026-09-17T18:06:00.631Z"
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}
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},
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "http://www.openwall.com/lists/oss-security/2026/09/17/4"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2026-09-17T18:09:16.072Z"
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}
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}
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]
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}
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} |