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[SECURITY] [DLA 3634-1] nss security update

Debian LTS Advisory DLA-3634-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                         Sean Whitton
October 28, 2023                              https://wiki.debian.org/LTS

Package        : nss
Version        : 2:3.42.1-1+deb10u7
CVE ID         : CVE-2020-25648 CVE-2023-4421

Multiple vulnerabilities were found in nss, a set of libraries designed
to support cross-platform development of security-enabled client and
server applications.


    A flaw was discovered in how NSS handles CipherChangeSpec messages
    in TLS 1.3.  It could allow an attacker to send multiple CCS
    messages to servers compiled against NSS, causing denial-of-service.


    A fuzzing project discovered vulnerabilities to Bleichenbacher
    timing attacks in NSS's facilities for RSA cryptography.

For Debian 10 buster, these problems have been fixed in version

We recommend that you upgrade your nss packages.

For the detailed security status of nss please refer to
its security tracker page at:

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

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