Executive Summary

Informations
Name CVE-2025-26465 First vendor Publication 2025-02-18
Vendor Cve Last vendor Modification 2025-03-06

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Overall CVSS Score 6.8
Base Score 6.8 Environmental Score 6.8
impact SubScore 5.2 Temporal Score 6.8
Exploitabality Sub Score 1.6
 
Attack Vector Network Attack Complexity High
Privileges Required None User Interaction Required
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-26465

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Application 1
Application 171
Application 1
Os 2
Os 1

Sources (Detail)

https://access.redhat.com/security/cve/CVE-2025-26465
https://blog.qualys.com/vulnerabilities-threat-research/2025/02/18/qualys-tru...
https://bugzilla.redhat.com/show_bug.cgi?id=2344780
https://bugzilla.suse.com/show_bug.cgi?id=1237040
https://ftp.openbsd.org/pub/OpenBSD/patches/7.6/common/008_ssh.patch.sig
https://lists.debian.org/debian-lts-announce/2025/02/msg00020.html
https://lists.mindrot.org/pipermail/openssh-unix-announce/2025-February/00016...
https://seclists.org/oss-sec/2025/q1/144
https://security-tracker.debian.org/tracker/CVE-2025-26465
https://security.netapp.com/advisory/ntap-20250228-0003/
https://ubuntu.com/security/CVE-2025-26465
https://www.openssh.com/releasenotes.html#9.9p2
https://www.openwall.com/lists/oss-security/2025/02/18/1
https://www.openwall.com/lists/oss-security/2025/02/18/4
https://www.theregister.com/2025/02/18/openssh_vulnerabilities_mitm_dos/
https://www.vicarius.io/vsociety/posts/cve-2025-26465-detect-vulnerable-openssh
https://www.vicarius.io/vsociety/posts/cve-2025-26465-mitigate-vulnerable-ope...
Source Url

Alert History

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Date Informations
2025-03-29 14:26:47
  • Multiple Updates
2025-03-06 21:20:46
  • Multiple Updates
2025-03-03 21:20:37
  • Multiple Updates
2025-02-28 17:27:31
  • Multiple Updates
2025-02-20 03:08:59
  • Multiple Updates
2025-02-20 03:08:58
  • Multiple Updates
2025-02-19 21:20:31
  • Multiple Updates
2025-02-19 09:20:31
  • Multiple Updates
2025-02-19 00:20:28
  • First insertion