Description
Sendmail 8.9.0 through 8.12.6 allows remote attackers to bypass relaying restrictions enforced by the 'check_relay' function by spoofing a blank DNS hostname.
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 | sendmail | 8.12.7 | — |
| Debian 13 | sendmail | 8.12.7 | — |
| Debian 12 | sendmail | 8.12.7 | — |
References
- oval:org.mitre.oval:def:6892 vdb-entry signature
- http://www.sendmail.org/8.12.7.html
- ADV-2009-3539 vdb-entry
- oval:org.mitre.oval:def:8512 vdb-entry signature
- 1005748 vdb-entry
- 6548 vdb-entry
- sendmail-check-relay-bypass(10775) vdb-entry
- 7826 third-party-advisory