241 lines
9.5 KiB
JSON
241 lines
9.5 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-2026-5950",
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"assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
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"state": "PUBLISHED",
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"assignerShortName": "isc",
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"dateReserved": "2026-04-09T06:42:23.953Z",
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"datePublished": "2026-05-20T13:10:19.989Z",
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"dateUpdated": "2026-05-20T13:38:53.211Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
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"shortName": "isc",
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"dateUpdated": "2026-05-20T13:10:19.989Z"
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},
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"title": "Unbounded resend loop in BIND 9 resolver",
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"datePublic": "2026-05-20T00:00:00.000Z",
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"affected": [
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{
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"vendor": "ISC",
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"product": "BIND 9",
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"versions": [
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{
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"version": "9.18.36",
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"lessThanOrEqual": "9.18.48",
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"status": "affected",
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"versionType": "custom"
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},
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{
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"version": "9.20.8",
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"lessThanOrEqual": "9.20.22",
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"status": "affected",
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"versionType": "custom"
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},
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{
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"version": "9.21.7",
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"lessThanOrEqual": "9.21.21",
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"status": "affected",
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"versionType": "custom"
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},
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{
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"version": "9.18.36-S1",
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"lessThanOrEqual": "9.18.48-S1",
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"status": "affected",
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"versionType": "custom"
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},
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{
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"version": "9.20.9-S1",
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"lessThanOrEqual": "9.20.22-S1",
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"status": "affected",
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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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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "9.18.36",
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"versionEndIncluding": "9.18.48"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "9.20.8",
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"versionEndIncluding": "9.20.22"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "9.21.7",
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"versionEndIncluding": "9.21.21"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "9.18.36-S1",
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"versionEndIncluding": "9.18.48-S1"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "9.20.9-S1",
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"versionEndIncluding": "9.20.22-S1"
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}
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]
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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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"cvssV3_1": {
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"version": "3.1",
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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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": "LOW",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
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"baseScore": 5.3,
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"baseSeverity": "MEDIUM"
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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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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-606",
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"description": "CWE-606 Unchecked Input for Loop Condition"
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}
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]
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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": "An unbounded resend loop vulnerability exists in the BIND 9 resolver state machine during bad-server handling, enabling a remote unauthenticated attacker to cause severe resource exhaustion by sending queries that trigger specific retry conditions.\nThis issue affects BIND 9 versions 9.18.36 through 9.18.48, 9.20.8 through 9.20.22, 9.21.7 through 9.21.21, 9.18.36-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1."
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}
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],
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"impacts": [
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{
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"descriptions": [
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{
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"lang": "en",
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"value": "Severe resource exhaustion."
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}
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]
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}
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],
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"workarounds": [
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{
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"lang": "en",
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"value": "No workarounds known."
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}
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],
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"exploits": [
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{
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"lang": "en",
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"value": "We are not aware of any active exploits."
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}
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],
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"solutions": [
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{
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"lang": "en",
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"value": "Upgrade to the patched release most closely related to your current version of BIND 9: 9.18.49, 9.20.23, 9.21.22, 9.18.49-S1, or 9.20.23-S1."
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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": "ISC would like to thank Billy Baraja (BielraX) for bringing this vulnerability to our attention."
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}
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],
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"references": [
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{
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"url": "https://kb.isc.org/docs/cve-2026-5950",
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"name": "CVE-2026-5950",
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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://downloads.isc.org/isc/bind9/9.18.49",
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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://downloads.isc.org/isc/bind9/9.20.23",
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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://downloads.isc.org/isc/bind9/9.21.22",
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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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"source": {
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"discovery": "EXTERNAL"
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},
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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": "2026-05-20T13:38:40.421994Z",
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"id": "CVE-2026-5950",
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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": "yes"
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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": "2026-05-20T13:38:53.211Z"
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}
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}
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]
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}
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} |