DSA-5409-1 libssh -- security update

Date Reported:

23 May 2023

Affected Packages:

libssh

Vulnerable:

Yes

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: https://security-tracker.debian.org/tracker/libssh