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Debian Security Advisory DSA-5417-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
May 31, 2023                          https://www.debian.org/security/faq
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Package        : openssl
CVE ID         : CVE-2023-0464 CVE-2023-0465 CVE-2023-0466 CVE-2023-2650
Debian Bug     : 1034720

Multiple vulnerabilities have been discovered in OpenSSL, a Secure
Sockets Layer toolkit.

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.

We recommend that you upgrade your openssl packages.

For the detailed security status of openssl please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/openssl

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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