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Debian LTS Advisory DLA-2937-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                         Anton Gladky
March 07, 2022                                https://wiki.debian.org/LTS
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Package        : gif2apng
Version        : 1.9+srconly-2+deb9u2
CVE ID         : CVE-2021-45909 CVE-2021-45910 CVE-2021-45911

Three issues have been discovered in gif2apng: tool for converting animated GIF images to APNG format.

CVE-2021-45909:

    heap-based buffer overflow vulnerability in the DecodeLZW function.
    It allows an attacker to write a large amount of arbitrary data outside the
    boundaries of a buffer.

CVE-2021-45910:

    heap-based buffer overflow within the main function. It allows an attacker
    to write data outside of the allocated buffer.

CVE-2021-45911:

    heap based buffer overflow in processing of delays in the main function.

For Debian 9 stretch, these problems have been fixed in version
1.9+srconly-2+deb9u2.

We recommend that you upgrade your gif2apng packages.

For the detailed security status of gif2apng please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/gif2apng

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