Summary
USN-7270-1 fixed a vulnerability in OpenSSH. This update provides
the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.
Original advisory details:
It was discovered that the OpenSSH client incorrectly handled the
non-default VerifyHostKeyDNS option. If that option were enabled, an
attacker could possibly impersonate a server by completely bypassing the
server identity check. (CVE-2025-26465)
Fixed packages 2
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | openssh | 1:7.2p2-4ubuntu2.10+esm7 |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | openssh | 1:7.6p1-4ubuntu0.7+esm4 |
Vulnerabilities 1
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Medium 6.8CVE-2025-26465 Public exploit
Openssh: machine-in-the-middle attack if verifyhostkeydns is enabled
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 cond…
References
-
report
https://ubuntu.com/security/CVE-2025-26465