Roundcube Webmail File Disclosure Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2021-11-03
• EPSS: 46% chance of exploitation in the next 30 days (higher than 99% of CVEs)

[ Description ]Official description

Roundcube Webmail before 1.1.10, 1.2.x before 1.2.7, and 1.3.x before 1.3.3 allows unauthorized access to arbitrary files on the host's filesystem, including configuration files, as exploited in the wild in November 2017. The attacker must be able to authenticate at the target system with a valid username/password as the attack requires an active session. The issue is related to file-based attachment plugins and _task=settings&_action=upload-display&_from=timezone requests.

CISA: Roundcube Webmail contains a file disclosure vulnerability caused by insufficient input validation in conjunction with file-based attachment plugins, which are used by default.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 3 May 2022): Apply updates per vendor instructions.

• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ References ]References

• packetstormsecurity.com/files/161226/Roundcube-Webmail-1.2-File-Disclosure.htmlExploitThird Party AdvisoryVDB Entry
• www.securityfocus.com/bid/101793Third Party AdvisoryVDB Entry
• github.com/roundcube/roundcubemail/issues/6026Issue TrackingPatchThird Party Advisory
• github.com/roundcube/roundcubemail/releases/tag/1.1.10Issue TrackingRelease NotesThird Party Advisory
• github.com/roundcube/roundcubemail/releases/tag/1.2.7Issue TrackingRelease NotesThird Party Advisory
• github.com/roundcube/roundcubemail/releases/tag/1.3.3Issue TrackingRelease NotesThird Party Advisory
• lists.debian.org/debian-lts-announce/2017/11/msg00039.htmlMailing ListThird Party Advisory
• roundcube.net/news/2017/11/08/security-updates-1.3.3-1.2.7-and-1.1.10Issue TrackingVendor Advisory
• www.debian.org/security/2017/dsa-4030Issue TrackingThird Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource