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Debian Security Advisory DSA-5496-1                   security@debian.org
https://www.debian.org/security/                       Moritz Muehlenhoff
September 13, 2023                    https://www.debian.org/security/faq
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Package        : firefox-esr
CVE ID         : CVE-2023-4863

A buffer overflow in parsing WebP images may result in the execution of
arbitrary code.

For the oldstable distribution (bullseye), this problem has been fixed
in version 102.15.1esr-1~deb11u1.

For the stable distribution (bookworm), this problem has been fixed in
version 102.15.1esr-1~deb12u1.

We recommend that you upgrade your firefox-esr packages.

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

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