[Announce] [CVE-2022-3515] GnuPG / Libksba Security Advisory

[Alessandro Vesely]

On Mon 17/Oct/2022 09:43:56 +0200 Werner Koch via Gnupg-users wrote:
> How to check whether GnuPG has been fixed
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
>    GnuPG is the most prominent user of Libksba and it is not immediately
>    visible whether a fixed version of Libksba is used. To check this run:
> 
>    ,----
>    | gpgconf --show-versions
>    `----
> 
>    and watch out for a line like
> 
>    ,----
>    | * KSBA 1.6.2 (xxxxx)
>    `----
> 
>    If you see a version number of 1.6.2 or newer, you got the fix.


Debian fix kept the old version number 1.5.0-3, though:


-------- Forwarded Message --------
Subject: [SECURITY] [DSA 5255-1] libksba security update
Resent-Date: Mon, 17 Oct 2022 20:13:43 +0000 (UTC)
Resent-From: debian-security-announce at lists.debian.org
Date: Mon, 17 Oct 2022 20:13:16 +0000
From: Salvatore Bonaccorso <carnil at debian.org>
Reply-To: debian-security-announce-request at lists.debian.org
To: debian-security-announce at lists.debian.org

-------------------------------------------------------------------------
Debian Security Advisory DSA-5255-1                   security at debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
October 17, 2022                      https://www.debian.org/security/faq
-------------------------------------------------------------------------

Package        : libksba
CVE ID         : CVE-2022-3515
Debian Bug     : 1021928

An integer overflow flaw was discovered in the CRL parser in libksba, an
X.509 and CMS support library, which could result in denial of service
or the execution of arbitrary code.

Details can be found in the upstream advisory at
https://gnupg.org/blog/20221017-pepe-left-the-ksba.html

For the stable distribution (bullseye), this problem has been fixed in
version 1.5.0-3+deb11u1.

We recommend that you upgrade your libksba packages.

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

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 at lists.debian.org