Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2023.3093
openssl security update
1 June 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: openssl
Publisher: Debian
Operating System: Debian GNU/Linux
Resolution: Patch/Upgrade
CVE Names: CVE-2023-2650 CVE-2023-0466 CVE-2023-0465
CVE-2023-0464
Original Bulletin:
https://lists.debian.org/debian-security-announce/2023/msg00108.html
Comment: CVSS (Max): 7.5 CVE-2023-0464 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVSS Source: [NVD], Red Hat
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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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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