Description
The DKIM implementation in Exim 4.7x before 4.76 permits matching for DKIM identities to apply to lookup items, instead of only strings, which allows remote attackers to execute arbitrary code or access a filesystem via a crafted identity.
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 | 4.76-1 | — |
| Debian 13 | exim4 | 4.76-1 | — |
| Debian 12 | exim4 | 4.76-1 | — |
| Debian 6.0 | exim4 | 4.72-6+squeeze2 | DSA-2236-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | exim | 4.86.2-2.2 | openSUSE-SU-2024:10017-1 |
Advisories 2
- DSA-2236-1 exim4 - command injection Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10017-1 exim-4.86.2-2.2 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- USN-1135-1 vendor-advisory
- [exim-announce] 20110512 Exim 4.76 Release: updated impact assessment mailing-list
- DSA-2236 vendor-advisory
- [exim-announce] 20110509 Exim 4.76 Release mailing-list
- 47836 vdb-entry