Description
An integer underflow has been identified in the unicode_to_utf8() function in tnef 1.4.14. This might lead to invalid write operations, controlled by an attacker.
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 | tnef | 1.4.12-1.2 | — |
| Debian 13 | tnef | 1.4.12-1.2 | — |
| Debian 12 | tnef | 1.4.12-1.2 | — |
| Debian 8 | tnef | 1.4.9-1+deb8u3 | DSA-3869-1 |
| Debian 7 | tnef | 1.4.9-1+deb7u3 | DLA-962-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | tnef | 1.4.9-1+deb8u3build0.16.04.1 | — |
| Ubuntu 14.04 LTS | tnef | 1.4.9-1+deb8u3build0.14.04.1 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tnef | 1.4.18-1.6 | openSUSE-SU-2024:11467-1 |
Advisories 3
- DSA-3869-1 tnef - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-962-1 tnef - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:11467-1 tnef-1.4.18-1.6 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- https://github.com/verdammelt/tnef/issues/23
- DSA-3869 vendor-advisory
- GLSA-201708-02 vendor-advisory