SB20251024125 - SUSE update for libssh

Description

This security bulletin contains information about 2 vulnerabilities.

1) NULL pointer dereference (CVE-ID: CVE-2025-8114)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attack to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error when calculating the session ID during the key exchange (KEX) process. A remote attacker can trick the victim into connecting to a malicious SSH server and crash the client app.

2) Memory leak (CVE-ID: CVE-2025-8277)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak when handling key exchange (KEX) processes if a client repeatedly sends incorrect KEX guesses. A remote attacker can trick the victim into connecting to a malicious SSH sever, force the application to leak memory and perform denial of service attack.

Remediation

Install update from vendor's website.

References

• https://www.suse.com/support/update/announcement/2025/suse-su-20253787-1/