Description
The DNS map code in Sendmail 8.12.8 and earlier, when using the "enhdnsbl" feature, does not properly initialize certain data structures, which allows remote attackers to cause a denial of service (process crash) via an invalid DNS response that causes Sendmail to free incorrect data.
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 | 8.12.9 | — |
| Debian 13 | sendmail | 8.12.9 | — |
| Debian 12 | sendmail | 8.12.9 | — |
References
- MDKSA-2003:086 vendor-advisory
- oval:org.mitre.oval:def:597 vdb-entry signature
- http://www.sendmail.org/dnsmap1.html
- RHSA-2003:265 vendor-advisory
- SuSE-SA:2003:035 vendor-advisory
- VU#993452 third-party-advisory
- CLA-2003:727 vendor-advisory