CVE search · CVE-2025-26465
CVE-2025-26465
medium 6.8
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.
Details
- Status
- Modified
- Published
- Last changed
- Source
- secalert@redhat.com
- Weakness
- CWE-390
Severity
| Version | Score | Vector | Source |
|---|---|---|---|
| CVSS 3.1 | medium 6.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N |
secalert@redhat.comSecondary |
| CVSS 3.1 | medium 6.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N |
nvd@nist.govPrimary |
Affected products
Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.
- openbsd · openssh
- netapp · active_iq_unified_manager
- netapp · ontap
- redhat · openshift_container_platform
- debian · debian_linux
- redhat · enterprise_linux
References
- https://access.redhat.com/errata/RHSA-2025:16823
- https://access.redhat.com/errata/RHSA-2025:3837
- https://access.redhat.com/errata/RHSA-2025:6993
- https://access.redhat.com/errata/RHSA-2025:8385
- https://access.redhat.com/security/cve/CVE-2025-26465Third Party Advisory
- https://access.redhat.com/solutions/7109879
- https://bugzilla.redhat.com/show_bug.cgi?id=2344780Issue TrackingThird Party Advisory
- https://seclists.org/oss-sec/2025/q1/144Mailing ListThird Party Advisory
- http://seclists.org/fulldisclosure/2025/Feb/18
- http://seclists.org/fulldisclosure/2025/May/7
- http://seclists.org/fulldisclosure/2025/May/8
- https://blog.qualys.com/vulnerabilities-threat-research/2025/02/18/qualys-tru-discovers-two-vulnerabilities-in-openssh-cve-2025-26465-cve-2025-26466Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1237040Issue Tracking
- https://ftp.openbsd.org/pub/OpenBSD/patches/7.6/common/008_ssh.patch.sigPatch
- https://lists.debian.org/debian-lts-announce/2025/02/msg00020.htmlThird Party Advisory
- https://lists.mindrot.org/pipermail/openssh-unix-announce/2025-February/000161.htmlThird Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2025-26465Third Party Advisory
- https://security.netapp.com/advisory/ntap-20250228-0003/Third Party Advisory
- https://ubuntu.com/security/CVE-2025-26465Third Party Advisory
- https://www.openssh.com/releasenotes.html#9.9p2Release Notes
- https://www.openwall.com/lists/oss-security/2025/02/18/1Mailing ListThird Party Advisory
- https://www.openwall.com/lists/oss-security/2025/02/18/4Mailing ListThird Party Advisory
- https://www.theregister.com/2025/02/18/openssh_vulnerabilities_mitm_dos/Press/Media Coverage
- https://www.vicarius.io/vsociety/posts/cve-2025-26465-detect-vulnerable-opensshThird Party Advisory
- https://www.vicarius.io/vsociety/posts/cve-2025-26465-mitigate-vulnerable-opensshMitigationThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-585531.html
- https://seclists.org/oss-sec/2025/q1/144Mailing ListThird Party Advisory