Debian 11: DSA-5417-1 Critical: OpenSSL Denial Of Service Issues

CVE-2023-0464

David Benjamin reported a flaw related to the verification of X.509
certificate chains that include policy constraints, which may result
in denial of service.

CVE-2023-0465

David Benjamin reported that invalid certificate policies in leaf
certificates are silently ignored. A malicious CA could take
advantage of this flaw to deliberately assert invalid certificate
policies in order to circumvent policy checking on the certificate
altogether.

CVE-2023-0466

David Benjamin discovered that the implementation of the
X509_VERIFY_PARAM_add0_policy() function does not enable the check
which allows certificates with invalid or incorrect policies to pass
the certificate verification (contrary to its documentation).

CVE-2023-2650

It was discovered that processing malformed ASN.1 object identifiers or data may result in denial of service.

For the stable distribution (bullseye), these problems have been fixed in
version 1.1.1n-0+deb11u5.

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