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Debian LTS Advisory DLA-3449-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                      Sylvain Beucler
June 08, 2023                                 https://wiki.debian.org/LTS
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Package        : openssl
Version        : 1.1.1n-0+deb10u5
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 Debian 10 buster, these problems have been fixed in version
1.1.1n-0+deb10u5.

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/source-package/openssl

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