MNBSD-2023-7: OpenSSH double free vulnerability

Severity: Unknown

Affected Package: openssh

Summary: OpenSSH double free vulnerability

Description

OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during options.kex_algorithms handling. This is fixed in OpenSSH 9.2. The double free can be leveraged, by an unauthenticated remote attacker in the default configuration, to jump to any location in the sshd address space. One third-party report states "remote code execution is theoretically possible."

Affected Versions

openssh

Specific versions:

Recommendations

No specific recommendations provided.

References

Additional Information

Aliases: CVE-2023-25136

Published: December 27, 2023
Last Modified: December 27, 2023