[xml/sgml-pkgs] Bug#1010526: libxml2: CVE-2022-29824: integer overflows in xmlBuf and xmlBuffer

[Salvatore Bonaccorso]

Source: libxml2
Version: 2.9.13+dfsg-1
Severity: grave
Tags: security upstream
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for libxml2.

CVE-2022-29824[0]:
| In libxml2 before 2.9.14, several buffer handling functions in buf.c
| (xmlBuf*) and tree.c (xmlBuffer*) don't check for integer overflows.
| This can result in out-of-bounds memory writes. Exploitation requires
| a victim to open a crafted, multi-gigabyte XML file. Other software
| using libxml2's buffer functions, for example libxslt through 1.1.35,
| is affected as well.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2022-29824
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-29824
[1] https://gitlab.gnome.org/GNOME/libxml2/-/commit/2554a2408e09f13652049e5ffb0d26196b02ebab

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore