Arch Linux Security Advisory ASA-201604-6 ========================================= Severity: Critical Date : 2016-04-06 CVE-ID : CVE-2016-3068 CVE-2016-3069 CVE-2016-3630 Package : mercurial Type : arbitrary code execution Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package mercurial before version 3.7.3-1 is vulnerable to arbitrary code execution. Resolution ========== Upgrade to 3.7.3-1. # pacman -Syu "mercurial>=3.7.3-1" The problems have been fixed upstream in version 3.7.3. Workaround ========== None. Description =========== - CVE-2016-3068 (arbitrary code execution) It was reported that in mercurial, there is similar vulnerability as CVE-2015-7545 in git. Git's git-remote-ext remote helper provides an ext:: URL scheme that allows running arbitrary shell commands. Mercurial allows specifying git repositories as subrepositories. Git ext:: URLs can be specified as Mercurial subrepositories allowing arbitrary shell commands to be run on `hg clone`. - CVE-2016-3069 (arbitrary code execution) It was reported that Convert extension in mercurial is vulnerable to command execution. Incorrect handling of command line parameters allows passing a full Git remote URL via a directory name. The Git ext:: URL scheme can be used to obtain arbitrary command execution. Furthermore, lack of escaping of shell metacharacters allows arbitrary command injection, which is another way of exploiting the vulnerable code. - CVE-2016-3630 (arbitrary code execution) Two bounds-checking errors have been discovered in the binary delta decoder that may be exploitable via clone, push, or pull leading to arbitrary code execution. Impact ====== A remote attacker is able to execute arbitrary code via the mercurial convert extension, git subrepositories or a vulnerability in the binary delta decoder. References ========== https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_3.7.3_.282016-3-29.29 https://access.redhat.com/security/cve/CVE-2016-3068 https://access.redhat.com/security/cve/CVE-2016-3069 https://access.redhat.com/security/cve/CVE-2016-3630 https://bugs.archlinux.org/task/48821