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Debian LTS: Security Advisory for php-horde-text-filter (DLA-2564-1)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update for the 'php-horde-text-filter' package(s) announced via the DLA-2564-1 advisory.
Insight
Insight
Alex Birnberg discovered a cross-site scripting (XSS) vulnerability in the Horde Application Framework, more precisely its Text Filter API. An attacker could take control of a user's mailbox by sending a crafted e-mail. CVE-2021-26929 An XSS issue was discovered in Horde Groupware Webmail Edition (where the Horde_Text_Filter library is used). The attacker can send a plain text e-mail message, with JavaScript encoded as a link or email that is mishandled by preProcess in Text2html.php, because bespoke use of \x00\x00\x00 and \x01\x01\x01 interferes with XSS defenses.
Affected Software
Affected Software
'php-horde-text-filter' package(s) on Debian Linux.
Detection Method
Detection Method
Checks if a vulnerable package version is present on the target host.
Solution
Solution
For Debian 9 stretch, this problem has been fixed in version 2.3.5-1+deb9u1. We recommend that you upgrade your php-horde-text-filter packages.