CVE-2025-26465
EUVD-2025-468618.02.2025, 19:15
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.Enginsight
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| openbsd | openssh | 6.9 ≤ 𝑥 ≤ 9.8 |
| openbsd | openssh | 6.8:p1 |
| openbsd | openssh | 9.9 |
| openbsd | openssh | 9.9:p1 |
| netapp | active_iq_unified_manager | - |
| redhat | openshift_container_platform | 4.0 |
| debian | debian_linux | 11.0 |
| debian | debian_linux | 12.0 |
| redhat | enterprise_linux | 9.0 |
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
| Vendor | Product | Version | Source |
|---|---|---|---|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN\/DP MFP | V3.1.5 ≤ 𝑥 < * | ADP |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN\/DP MFP | V3.1.5 ≤ 𝑥 < * | ADP |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN\/DP MFP | V3.1.5 ≤ 𝑥 < * | ADP |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN\/DP MFP | V3.1.5 ≤ 𝑥 < * | ADP |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN\/DP MFP | V3.1.5 ≤ 𝑥 < * | ADP |
Debian Releases
Ubuntu Releases
Ubuntu Product | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| openssh |
| ||||||||||||||||||||
| openssh-ssh1 |
|
Red Hat Enterprise Linux Releases
Red Hat Product | |||||
|---|---|---|---|---|---|
| openssh |
| ||||
| openssh-askpass |
| ||||
| openssh-cavs |
| ||||
| openssh-clients |
| ||||
| openssh-keycat |
| ||||
| openssh-ldap |
| ||||
| openssh-server |
| ||||
| pam |
|
Common Weakness Enumeration
References