Description
expand.c in Exim before 4.83 expands mathematical comparisons twice, which allows local users to gain privileges and execute arbitrary commands via a crafted lookup value.
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 | exim4 | 4.82.1-2 | — |
| Debian 13 | exim4 | 4.82.1-2 | — |
| Debian 12 | exim4 | 4.82.1-2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | exim4 | 4.82-3ubuntu2.1 | USN-2933-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | exim | 4.86.2-2.2 | openSUSE-SU-2024:10017-1 |
Advisories 2
- USN-2933-1 exim4 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- openSUSE-SU-2024:10017-1 exim-4.86.2-2.2 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- FEDORA-2014-8865 vendor-advisory
- http://git.exim.org/exim.git/commitdiff/7685ce68148a083d7759e78d01aa5198fc099c44
- FEDORA-2014-8803 vendor-advisory
- [exim] 20140722 [exim] Exim 4.83 Released mailing-list
- [exim] 20140722 [exim] Exim Security Advisory CVE-2014-2972 mailing-list
- GLSA-201607-12 vendor-advisory
- USN-2933-1 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1122552