Description
CRLF injection vulnerability in Utils.py in Mailman before 2.1.9rc1 allows remote attackers to spoof messages in the error log and possibly trick the administrator into visiting malicious URLs via CRLF sequences in the URI.
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 3.1 | mailman | 2.1.5-8sarge5 | DSA-1188-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 4 | mailman | 3:2.1.5.1-34.rhel4.6 | RHSA-2007:0779 |
Advisories 2
- RHSA-2007:0779 Red Hat Security Advisory: mailman security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1188-1 mailman Debian Security (DSA / DLA) · Mar 9, 2026
References
- ADV-2006-3446 vdb-entry
- DSA-1188 vendor-advisory
- [Mailman-Announce] 20060913 RELEASED: Mailman 2.1.9 mailing-list
- 19831 vdb-entry
- mailman-admin-spoofing(28734) vdb-entry
- 22639 third-party-advisory
- 20021 vdb-entry
- RHSA-2007:0779 vendor-advisory
- GLSA-200609-12 vendor-advisory
- 20060913 Mailman 2.1.8 Multiple Security Issues mailing-list
- http://svn.sourceforge.net/viewvc/mailman/trunk/mailman/Mailman/Utils.py?r1=7859&r2=7923
- 27669 third-party-advisory
- 22227 third-party-advisory
- SUSE-SR:2006:025 vendor-advisory
- MDKSA-2006:165 vendor-advisory
- http://sourceforge.net/project/shownotes.php?group_id=103&release_id=444295
- 21732 third-party-advisory
- http://moritz-naumann.com/adv/0013/mailmanmulti/0013.txt
- 22011 third-party-advisory
- oval:org.mitre.oval:def:9756 vdb-entry signature
- 22020 third-party-advisory