Debian Security Advisory

DSA-5409-1 libssh -- security update

Date Reported:
23 May 2023
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 1035832.
In Mitre's CVE dictionary: CVE-2023-1667, CVE-2023-2283.
More information:

Two security issues have been discovered in libssh, a tiny C SSH library:

  • CVE-2023-1667

    Philip Turnbull discovered a NULL pointer dereference which could result in denial of service.

  • CVE-2023-2283

    Kevin Backhouse discovered that pki_verify_data_signature() may fail to correctly validate authentication in memory pressure situations.

For the stable distribution (bullseye), these problems have been fixed in version 0.9.7-0+deb11u1.

We recommend that you upgrade your libssh packages.

For the detailed security status of libssh please refer to its security tracker page at: