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Arch Linux: ASA-201410-13 High: ejabberd Encryption Circumvention

The package ejabberd before version 14.07-2 allows clients to connect with an unencrypted connection even if starttls_required is set. . Arch Linux Security Advisory ASA-201410-13 ========================================= Severity: High Date : 2014-10-27 CVE-ID : CVE-2014-8760 Package : ejabberd Type : circumvention of encryption Remote : No Link : https://wiki.archlinux.org/title/CVE-2014 Summary ====== The package ejabberd before version 14.07-2 allows clients to connect with an unencrypted connection even if starttls_required is set. Resolution ========= Upgrade to 14.07-2. # pacman -Syu "ejabberd> =14.07-2" The problems have been fixed upstream [0] but no release version is available yet. Workaround ========= Disable compression ('zlib' in c2s configuration) and find affected users with: # ejabberdctl connected_users_info | grep 'c2s_compressed\s' You may kick affected user sessions and they should be able to reconnect with encryption and without compression. Description ========== It was discovered that ejabberd does not enforce the starttls_required setting when compression is used, which causes clients to unexpectedly establish connections without encryption. Impact ===== A local user can unexpectedly connect without any encryption and send sensitive information in plaintext to the server even if encryption was set as required. References ========= [0] https://github.com/processone/ejabberd/commit/7bdc115 https://www.cve.org/CVERecord?id=CVE-2014-8760 https://bugs.archlinux.org/task/42541 . Critical Arch Linux security notice regarding ejabberd improperly managing unencrypted connections despite configured encryption parameters.. ejabberd Security, Arch Linux Update, Encryption Issue. . LinuxSecurity.com Team

Oct 27, 2014 ArchLinux