Description
In LibTIFF 4.0.8, there is a assertion abort in the TIFFWriteDirectoryTagCheckedLong8Array function in tif_dirwrite.c. A crafted input will lead to a remote denial of service attack.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | tiff | 4.0.8-3 | — |
| Debian 13 | tiff | 4.0.8-3 | — |
| Debian 12 | tiff | 4.0.8-3 | — |
| Debian 9 | tiff | 4.0.8-2+deb9u1 | DSA-3903-1 |
| Debian 8 | tiff | 4.0.3-12.3+deb8u4 | DSA-3903-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | tiff | 4.0.2-6+deb7u15 | DLA-1022-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | tiff | 4.0.6-1ubuntu0.3 | USN-3602-1 |
| Ubuntu 14.04 LTS | tiff | 4.0.3-7ubuntu0.8 | USN-3602-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | tiff | 4.0.8-r1 | — |
| Alpine v3.23 | tiff | 4.0.8-r1 | — |
| Alpine v3.22 | tiff | 4.0.8-r1 | — |
| Alpine v3.21 | tiff | 4.0.8-r1 | — |
| Alpine v3.20 | tiff | 4.0.8-r1 | — |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | tiff | 4.0.8-r1 | — |
| Alpine v3.18 | tiff | 4.0.8-r1 | — |
| Alpine v3.17 | tiff | 4.0.8-r1 | — |
| Alpine v3.16 | tiff | 4.0.8-r1 | — |
| Alpine v3.15 | tiff | 4.0.8-r1 | — |
| Alpine v3.14 | tiff | 4.0.8-r1 | — |
| Alpine v3.13 | tiff | 4.0.8-r1 | — |
| Alpine v3.12 | tiff | 4.0.8-r1 | — |
| Alpine v3.11 | tiff | 4.0.8-r1 | — |
| Alpine v3.10 | tiff | 4.0.8-r1 | — |
| Alpine v3.9 | tiff | 4.0.8-r1 | — |
| Alpine v3.8 | tiff | 4.0.8-r1 | — |
| Alpine v3.7 | tiff | 4.0.8-r1 | — |
| Alpine v3.6 | tiff | 4.0.8-r0 | — |
| Alpine v3.5 | tiff | 4.0.8-r0 | — |
| Alpine v3.4 | tiff | 4.0.8-r0 | — |
| Alpine v3.3 | tiff | 4.0.8-r0 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- LibTIFF - 'tif_dirwrite.c' Denial of Service EDB-42299 · dos · Jul 6, 2017 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 3
- USN-3602-1 tiff vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3903-1 tiff - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1022-1 tiff - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- 99359 vdb-entry
- 42299 exploit
- USN-3602-1 vendor-advisory
- http://bugzilla.maptools.org/show_bug.cgi?id=2712
- DSA-3903 vendor-advisory