Description
functions/page_header.php in SquirrelMail 1.4.21 and earlier does not prevent page rendering inside a frame in a third-party HTML document, which makes it easier for remote attackers to conduct clickjacking attacks via a crafted web site.
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 6.0 | squirrelmail | 2:1.4.21-2 | DSA-2291-1 |
| Debian 5.0 | squirrelmail | 2:1.4.15-4+lenny5 | DSA-2291-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | squirrelmail | 1.4.8-5.el5_7.13 | RHSA-2012:0103 |
| RHEL 4 | squirrelmail | 1.4.8-18.el4 | RHSA-2012:0103 |
Advisories 2
- DSA-2291-1 squirrelmail - various issues Debian Security (DSA / DLA) · Mar 9, 2026
- RHSA-2012:0103 Red Hat Security Advisory: squirrelmail security update Red Hat Security Advisories (RHSA) · Jan 29, 2026
References
- DSA-2291 vendor-advisory
- squirrelmail-http-clickjacking(68512) vdb-entry
- http://support.apple.com/kb/HT5130
- http://www.squirrelmail.org/security/issue/2011-07-12
- https://bugzilla.redhat.com/show_bug.cgi?id=720693
- MDVSA-2011:123 vendor-advisory
- APPLE-SA-2012-02-01-1 vendor-advisory
- http://squirrelmail.svn.sourceforge.net/viewvc/squirrelmail/branches/SM-1_4-STABLE/squirrelmail/functions/page_header.php?view=patch&r1=14117&r2=14116&pathrev=14117
- RHSA-2012:0103 vendor-advisory