CVE-2022-4645 Denial of service in libtiff

Medium 6.8 Published 3 Mar 2023 Updated 4 Apr 2025

Attackers can cause denial of service in LibTIFF via crafted TIFF files due to an out-of-bounds read in tiffcp.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2022-4645?

CVE-2022-4645 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 3 Mar 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

LibTIFF 4.4.0 has an out-of-bounds read in tiffcp in tools/tiffcp.c:948, allowing attackers to cause a denial-of-service via a crafted tiff file. For users that compile libtiff from sources, the fix is available with commit e8131125.

Weakness: CWE-125

Which versions are affected by CVE-2022-4645?

It affects 2 products.

Linux distribution packages (13)

`libtiff` AlmaLinux:8	All versions	`4.0.9-31.el8`
`libtiff-devel` AlmaLinux:8	All versions	`4.0.9-31.el8`
`libtiff-tools` AlmaLinux:8	All versions	`4.0.9-31.el8`
`libtiff` Red Hat:enterprise_linux:8::appstream	All versions	`0:4.0.9-31.el8`
`libtiff-debuginfo` Red Hat:enterprise_linux:8::appstream	All versions	`0:4.0.9-31.el8`
`libtiff-debugsource` Red Hat:enterprise_linux:8::appstream	All versions	`0:4.0.9-31.el8`
`libtiff-devel` Red Hat:enterprise_linux:8::appstream	All versions	`0:4.0.9-31.el8`
`libtiff-tools-debuginfo` Red Hat:enterprise_linux:8::appstream	All versions	`0:4.0.9-31.el8`
`libtiff-debuginfo` Red Hat:enterprise_linux:8::crb	All versions	`0:4.0.9-31.el8`
`libtiff-debugsource` Red Hat:enterprise_linux:8::crb	All versions	`0:4.0.9-31.el8`
`libtiff-tools` Red Hat:enterprise_linux:8::crb	All versions	`0:4.0.9-31.el8`
`libtiff-tools-debuginfo` Red Hat:enterprise_linux:8::crb	All versions	`0:4.0.9-31.el8`
`libtiff` Rocky Linux:8	All versions	`0:4.0.9-31.el8`

Products include Fedoraproject Fedora, Libtiff Libtiff.

How do I fix CVE-2022-4645?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2022-4645 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-4645 exists.

All Fedoraproject Fedora vulnerabilities

Sources

Also known as ALPINE-CVE-2022-4645, ALSA-2024:3059, AZL-13826, AZL-43561, AZL-44667, DEBIAN-CVE-2022-4645 and 6 more.