# CVE-2023-2731: tiff: A NULL pointer dereference flaw was found in Libtiff's LZWDecode() function in the libtiff/tif_lzw.c file

CVE-2023-2731 is fixed in 8 products on 1 platform, first by DEBIAN-CVE-2023-2731, released May 17, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-2731
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0043
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 17, 2023

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libtiff RHEL 9 | 0:4.4.0-10.el9 | [RHSA-2023:6575](https://patchblox.com/security/data/fix/linux/rhsa-2023-6575.md) | Nov 7, 2023 |
| Linux | libtiff almalinux 9 | 4.4.0-10.el9 | [ALSA-2023:6575](https://patchblox.com/security/data/fix/linux/alsa-2023-6575.md) | Nov 7, 2023 |
| Linux | libtiff amzn 2023 | 4.4.0-4.amzn2023.0.13 | [ALAS2023-2023-329](https://patchblox.com/security/data/fix/linux/alas2023-2023-329.md) | Aug 31, 2023 |
| Linux | libtiff ol 9 | 0:4.4.0-10.el9 | [ELSA-2023-6575](https://patchblox.com/security/data/fix/linux/elsa-2023-6575.md) | Nov 11, 2023 |
| Linux | libtiff-debuginfo amzn 2023 | 4.4.0-4.amzn2023.0.13 | [ALAS2023-2023-329](https://patchblox.com/security/data/fix/linux/alas2023-2023-329.md) | Aug 31, 2023 |
| Linux | libtiff-debugsource amzn 2023 | 4.4.0-4.amzn2023.0.13 | [ALAS2023-2023-329](https://patchblox.com/security/data/fix/linux/alas2023-2023-329.md) | Aug 31, 2023 |
| Linux | libtiff-devel RHEL 9 | 0:4.4.0-10.el9 | [RHSA-2023:6575](https://patchblox.com/security/data/fix/linux/rhsa-2023-6575.md) | Nov 7, 2023 |
| Linux | libtiff-devel almalinux 9 | 4.4.0-10.el9 | [ALSA-2023:6575](https://patchblox.com/security/data/fix/linux/alsa-2023-6575.md) | Nov 7, 2023 |
| Linux | libtiff-devel amzn 2023 | 4.4.0-4.amzn2023.0.13 | [ALAS2023-2023-329](https://patchblox.com/security/data/fix/linux/alas2023-2023-329.md) | Aug 31, 2023 |
| Linux | libtiff-devel ol 9 | 0:4.4.0-10.el9 | [ELSA-2023-6575](https://patchblox.com/security/data/fix/linux/elsa-2023-6575.md) | Nov 11, 2023 |
| Linux | libtiff-static amzn 2023 | 4.4.0-4.amzn2023.0.13 | [ALAS2023-2023-329](https://patchblox.com/security/data/fix/linux/alas2023-2023-329.md) | Aug 31, 2023 |
| Linux | libtiff-tools RHEL 9 | 0:4.4.0-10.el9 | [RHSA-2023:6575](https://patchblox.com/security/data/fix/linux/rhsa-2023-6575.md) | Nov 7, 2023 |
| Linux | libtiff-tools almalinux 9 | 4.4.0-10.el9 | [ALSA-2023:6575](https://patchblox.com/security/data/fix/linux/alsa-2023-6575.md) | Nov 7, 2023 |
| Linux | libtiff-tools amzn 2023 | 4.4.0-4.amzn2023.0.13 | [ALAS2023-2023-329](https://patchblox.com/security/data/fix/linux/alas2023-2023-329.md) | Aug 31, 2023 |
| Linux | libtiff-tools ol 9 | 0:4.4.0-10.el9 | [ELSA-2023-6575](https://patchblox.com/security/data/fix/linux/elsa-2023-6575.md) | Nov 11, 2023 |
| Linux | libtiff-tools-debuginfo amzn 2023 | 4.4.0-4.amzn2023.0.13 | [ALAS2023-2023-329](https://patchblox.com/security/data/fix/linux/alas2023-2023-329.md) | Aug 31, 2023 |
| Linux | tiff Debian 12.15 (bookworm) | 4.5.0-6 | [DEBIAN-CVE-2023-2731](https://patchblox.com/security/data/fix/linux/debian-cve-2023-2731.md) | May 17, 2023 |
| Linux | tiff Debian 13.5 (trixie) | 4.5.0-6 | [DEBIAN-CVE-2023-2731](https://patchblox.com/security/data/fix/linux/debian-cve-2023-2731.md) | May 17, 2023 |
| Linux | tiff Debian 14 | 4.5.0-6 | [DEBIAN-CVE-2023-2731](https://patchblox.com/security/data/fix/linux/debian-cve-2023-2731.md) | May 17, 2023 |

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