Description
An issue was discovered in ytnef before 1.9.1. This is related to a patch described as "2 of 9. Infinite Loop / DoS in the TNEFFillMapi function in lib/ytnef.c."
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 | libytnef | 1.9.1-1 | — |
| Debian 13 | libytnef | 1.9.1-1 | — |
| Debian 12 | libytnef | 1.9.1-1 | — |
| Debian 8 | libytnef | 1.5-6+deb8u1 | DSA-3846-1 |
| Debian 7 | libytnef | 1.5-4+deb7u1 | DLA-878-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | libytnef | 1.5-9ubuntu0.1 | USN-4615-1 |
| Ubuntu 14.04 LTS | libytnef | 1.5-6ubuntu0.1 | USN-3288-1 |
Advisories 4
- USN-4615-1 libytnef vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3288-1 libytnef vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-878-1 libytnef - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3846-1 libytnef - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- 96423 vdb-entry
- http://www.openwall.com/lists/oss-security/2017/02/15/4
- https://github.com/Yeraze/ytnef/pull/27
- DSA-3846 vendor-advisory
- https://www.x41-dsec.de/lab/advisories/x41-2017-002-ytnef/
- FEDORA-2019-7d7083b8be vendor-advisory