156 lines
7.0 KiB
JSON
156 lines
7.0 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-2026-27624",
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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": "2026-02-20T22:02:30.027Z",
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"datePublished": "2026-02-25T04:04:17.009Z",
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"dateUpdated": "2026-02-25T15:09:21.716Z"
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},
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"containers": {
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"cna": {
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"title": "Coturn: IPv4-mapped IPv6 (::ffff:0:0/96) bypasses denied-peer-ip ACL",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-284",
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"lang": "en",
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"description": "CWE-284: Improper Access Control",
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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-441",
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"lang": "en",
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"description": "CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')",
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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": "LOW",
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"attackVector": "NETWORK",
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"availabilityImpact": "NONE",
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"baseScore": 7.2,
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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": "CHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
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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/coturn/coturn/security/advisories/GHSA-j8mm-mpf8-gvjg",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/coturn/coturn/security/advisories/GHSA-j8mm-mpf8-gvjg"
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},
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{
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"name": "https://github.com/coturn/coturn/security/advisories/GHSA-6g6j-r9rf-cm7p",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/coturn/coturn/security/advisories/GHSA-6g6j-r9rf-cm7p"
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},
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{
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"name": "https://github.com/coturn/coturn/commit/b80eb898ba26552600770162c26a8ae7f3661b0b",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/coturn/coturn/commit/b80eb898ba26552600770162c26a8ae7f3661b0b"
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}
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],
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"affected": [
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{
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"vendor": "coturn",
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"product": "coturn",
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"versions": [
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{
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"version": "< 4.9.0",
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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": "2026-02-25T04:04:17.009Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Coturn is a free open source implementation of TURN and STUN Server. Coturn is commonly configured to block loopback and internal ranges using \"denied-peer-ip\" and/or default loopback restrictions. CVE-2020-26262 addressed bypasses involving \"0.0.0.0\", \"[::1]\" and \"[::]\", but IPv4-mapped IPv6 is not covered. When sending a \"CreatePermission\" or \"ChannelBind\" request with the \"XOR-PEER-ADDRESS\" value of \"::ffff:127.0.0.1\", a successful response is received, even though \"127.0.0.0/8\" is blocked via \"denied-peer-ip\". The root cause is that, prior to the updated fix implemented in version 4.9.0, three functions in \"src/client/ns_turn_ioaddr.c\" do not check \"IN6_IS_ADDR_V4MAPPED\". \"ioa_addr_is_loopback()\" checks \"127.x.x.x\" (AF_INET) and \"::1\" (AF_INET6), but not \"::ffff:127.0.0.1.\" \"ioa_addr_is_zero()\" checks \"0.0.0.0\" and \"::\", but not \"::ffff:0.0.0.0.\" \"addr_less_eq()\" used by \"ioa_addr_in_range()\" for \"denied-peer-ip\" matching: when the range is AF_INET and the peer is AF_INET6, the comparison returns 0 without extracting the embedded IPv4. Version 4.9.0 contains an updated fix to address the bypass of the fix for CVE-2020-26262."
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}
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],
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"source": {
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"advisory": "GHSA-j8mm-mpf8-gvjg",
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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/coturn/coturn/security/advisories/GHSA-6g6j-r9rf-cm7p",
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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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"url": "https://github.com/coturn/coturn/security/advisories/GHSA-j8mm-mpf8-gvjg",
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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": "2026-02-25T15:09:17.451722Z",
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"id": "CVE-2026-27624",
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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": "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": "2026-02-25T15:09:21.716Z"
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}
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}
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]
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}
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} |