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[SECURITY] [DLA 3660-1] gnutls28 security update

Debian LTS Advisory DLA-3660-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                      Markus Koschany
November 22, 2023                             https://wiki.debian.org/LTS

Package        : gnutls28
Version        : 3.6.7-4+deb10u11
CVE ID         : CVE-2023-5981
Debian Bug     : 1056188

A vulnerability was found in GnuTLS, a secure communications library, which
may facilitate a timing attack to compromise a cryptographic system. The
response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ
from response times of ciphertexts with correct PKCS#1 v1.5 padding. Only
TLS ciphertext processing is affected.

For Debian 10 buster, this problem has been fixed in version

We recommend that you upgrade your gnutls28 packages.

For the detailed security status of gnutls28 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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