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Debian LTS Advisory DLA-3223-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                        Helmut Grohne
December 05, 2022                             https://wiki.debian.org/LTS
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Package        : giflib
Version        : 5.1.4-3+deb10u1
CVE ID         : CVE-2018-11490 CVE-2019-15133
Debian Bug     : 904114

This update fixes two file format vulnerabilities in giflib.

CVE-2018-11490

    The DGifDecompressLine function in dgif_lib.c, as later shipped in
    cgif.c in sam2p 0.49.4, has a heap-based buffer overflow because a
    certain "Private->RunningCode - 2" array index is not checked.  This
    will lead to a denial of service or possibly unspecified other
    impact.

CVE-2019-15133

    A malformed GIF file triggers a divide-by-zero exception in the
    decoder function DGifSlurp in dgif_lib.c if the height field of the
    ImageSize data structure is equal to zero.

For Debian 10 buster, these problems have been fixed in version
5.1.4-3+deb10u1.

We recommend that you upgrade your giflib packages.

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

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

Debian LTS: DLA-3223-1: giflib security update

December 5, 2022
This update fixes two file format vulnerabilities in giflib

Summary

CVE-2018-11490

The DGifDecompressLine function in dgif_lib.c, as later shipped in
cgif.c in sam2p 0.49.4, has a heap-based buffer overflow because a
certain "Private->RunningCode - 2" array index is not checked. This
will lead to a denial of service or possibly unspecified other
impact.

CVE-2019-15133

A malformed GIF file triggers a divide-by-zero exception in the
decoder function DGifSlurp in dgif_lib.c if the height field of the
ImageSize data structure is equal to zero.

For Debian 10 buster, these problems have been fixed in version
5.1.4-3+deb10u1.

We recommend that you upgrade your giflib packages.

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

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


Severity
Package : giflib
Version : 5.1.4-3+deb10u1
CVE ID : CVE-2018-11490 CVE-2019-15133
Debian Bug : 904114

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