ghsa-jrwv-mv4h-7rrq
Vulnerability from github
Published
2025-02-18 21:32
Modified
2025-02-19 15:32
Severity ?
Details
A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.
{
"affected": [],
"aliases": [
"CVE-2025-26465"
],
"database_specific": {
"cwe_ids": [
"CWE-390"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-18T19:15:29Z",
"severity": "MODERATE"
},
"details": "A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client\u0027s memory resource first, turning the attack complexity high.",
"id": "GHSA-jrwv-mv4h-7rrq",
"modified": "2025-02-19T15:32:12Z",
"published": "2025-02-18T21:32:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-26465"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2025-26465"
},
{
"type": "WEB",
"url": "https://blog.qualys.com/vulnerabilities-threat-research/2025/02/18/qualys-tru-discovers-two-vulnerabilities-in-openssh-cve-2025-26465-cve-2025-26466"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2344780"
},
{
"type": "WEB",
"url": "https://bugzilla.suse.com/show_bug.cgi?id=1237040"
},
{
"type": "WEB",
"url": "https://ftp.openbsd.org/pub/OpenBSD/patches/7.6/common/008_ssh.patch.sig"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/02/msg00020.html"
},
{
"type": "WEB",
"url": "https://lists.mindrot.org/pipermail/openssh-unix-announce/2025-February/000161.html"
},
{
"type": "WEB",
"url": "https://seclists.org/oss-sec/2025/q1/144"
},
{
"type": "WEB",
"url": "https://security-tracker.debian.org/tracker/CVE-2025-26465"
},
{
"type": "WEB",
"url": "https://ubuntu.com/security/CVE-2025-26465"
},
{
"type": "WEB",
"url": "https://www.openssh.com/releasenotes.html#9.9p2"
},
{
"type": "WEB",
"url": "https://www.openwall.com/lists/oss-security/2025/02/18/1"
},
{
"type": "WEB",
"url": "https://www.openwall.com/lists/oss-security/2025/02/18/4"
},
{
"type": "WEB",
"url": "https://www.theregister.com/2025/02/18/openssh_vulnerabilities_mitm_dos"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
]
}
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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.