CVE-2023-2731: Null Pointer Dereference
First published: Tue May 16 2023(Updated: )
A NULL pointer dereference flaw was found in Libtiff's LZWDecode() function in the libtiff/tif_lzw.c file. This flaw allows a local attacker to craft specific input data that can cause the program to dereference a NULL pointer when decompressing a TIFF format file, resulting in a program crash or denial of service.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Libtiff Libtiff | <4.5.0 | |
| Fedoraproject Fedora | =38 | |
| Redhat Enterprise Linux | =9.0 | |
| redhat/libtiff | <4.5.0 | 4.5.0 |
| debian/tiff | 4.2.0-1+deb11u5 4.5.0-6+deb12u1 4.5.1+git230720-5 |
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Reference Links
- https://access.redhat.com/security/cve/CVE-2023-2731
- https://bugzilla.redhat.com/show_bug.cgi?id=2207635
- https://github.com/libsdl-org/libtiff/commit/9be22b639ea69e102d3847dca4c53ef025e9527b
- https://gitlab.com/libtiff/libtiff/-/issues/548
- https://security.netapp.com/advisory/ntap-20230703-0009/
- https://launchpad.net/bugs/cve/CVE-2023-2731
- https://gitlab.com/gitlab-org/build/omnibus-mirror/libtiff/-/commit/9be22b639ea69e102d3847dca4c53ef025e9527b
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2207638
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2207637
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2207639
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2207640
- https://access.redhat.com/errata/RHSA-2023:6575
- https://gitlab.com/libtiff/libtiff/-/commit/9be22b639ea69e102d3847dca4c53ef025e9527b
- https://gitlab.com/libtiff/libtiff/-/commit/3079627ea0dee150e6a208cec8381de611bb842b
- https://security-tracker.debian.org/tracker/CVE-2023-2731
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2731
- https://nvd.nist.gov/vuln/detail/CVE-2023-2731
- https://ubuntu.com/security/CVE-2023-2731
Frequently Asked Questions
What is CVE-2023-2731?
CVE-2023-2731 is a vulnerability in Libtiff's LZWDecode() function in the libtiff/tif_lzw.c file that can be exploited by a local attacker to crash or disrupt the program.
How does CVE-2023-2731 impact affected software?
CVE-2023-2731 can cause an affected software to crash or become unresponsive when processing a TIFF format file.
Which software versions are affected by CVE-2023-2731?
The affected software versions include tiff 4.5.0-5ubuntu1.1, tiff 4.5.0-6 and 4.5.1, and libtiff 4.1.0+git191117-2~deb10u4, 4.1.0+git191117-2~deb10u8, 4.2.0-1+deb11u4, 4.5.0, and 4.5.1+git230720-1.
How can I mitigate CVE-2023-2731?
To mitigate CVE-2023-2731, users should update their Libtiff software to version 4.5.0-5ubuntu1.1 or apply the recommended patches provided by the software vendor.
Where can I find more information about CVE-2023-2731?
More information about CVE-2023-2731 can be found on the Red Hat Security Advisory, Bugzilla, and GitHub pages linked in the references.
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