164 lines
6.7 KiB
JSON
164 lines
6.7 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-2026-63387",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-07-16T17:39:30.171Z",
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"datePublished": "2026-08-20T17:53:41.863Z",
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"dateUpdated": "2026-08-25T15:12:12.129Z"
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},
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"containers": {
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"cna": {
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"title": "Libevent: Off-by-one stack buffer overflow in dnsname_to_labels via crafted DNS server response",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-121",
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"lang": "en",
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"description": "CWE-121: Stack-based Buffer Overflow",
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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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"descriptions": [
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{
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"cweId": "CWE-193",
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"lang": "en",
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"description": "CWE-193: Off-by-one Error",
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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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"descriptions": [
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{
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"cweId": "CWE-787",
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"lang": "en",
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"description": "CWE-787: Out-of-bounds Write",
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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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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "HIGH",
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"attackVector": "NETWORK",
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"availabilityImpact": "HIGH",
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"baseScore": 7,
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"baseSeverity": "HIGH",
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"confidentialityImpact": "LOW",
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"integrityImpact": "LOW",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H",
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"version": "3.1"
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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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"name": "https://github.com/libevent/libevent/security/advisories/GHSA-58rx-7448-jw47",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/libevent/libevent/security/advisories/GHSA-58rx-7448-jw47"
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},
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{
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"name": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable"
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},
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{
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"name": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
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}
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],
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"affected": [
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{
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"vendor": "libevent",
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"product": "libevent",
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"versions": [
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{
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"version": ">= 2.2.0-alpha, < 2.2.2-alpha",
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"status": "affected"
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},
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{
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"version": "< 2.1.13",
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"status": "affected"
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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": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-08-20T17:53:41.863Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has an off-by-one stack buffer overflow in evdns.c when dnsname_to_labels formats a name-bearing DNS record at the end of the 64 KB stack buffer allocated by evdns_server_request_format_response. The final-label check permits j plus label_len plus one to equal buf_len, after which the terminating null byte is written to buf[buf_len]. A crafted DNS server response containing PTR, CNAME, MX, NS, or SOA data can trigger the one-byte out-of-bounds write and crash or corrupt the process. This issue is fixed in versions 2.1.13 and 2.2.2-alpha."
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}
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],
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"source": {
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"advisory": "GHSA-58rx-7448-jw47",
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"discovery": "UNKNOWN"
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}
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},
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"adp": [
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{
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"references": [
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{
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"url": "https://github.com/libevent/libevent/security/advisories/GHSA-58rx-7448-jw47",
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"tags": [
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"exploit"
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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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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-08-25T15:11:49.042805Z",
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"id": "CVE-2026-63387",
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"options": [
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{
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"Exploitation": "poc"
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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": "2026-08-25T15:12:12.129Z"
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}
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}
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]
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}
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} |