Arch Linux Security Advisory ASA-201511-9 ========================================= Severity: High Date : 2015-11-17 CVE-ID : CVE-2015-7981 CVE-2015-8126 Package : libpng Type : multiple issues Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package libpng before version 1.6.19-1 is vulnerable to denial-of-service and arbitrary code execution. Resolution ========== Upgrade to 1.6.19-1. # pacman -Syu "libpng>=1.6.19-1" The problems have been fixed upstream in version 1.6.19. Workaround ========== None. Description =========== - CVE-2015-7981 (out-of-bounds read) This is an array indexing error, which can lead to an out-of-bounds read of a static buffer. The result is now unsigned (no longer negative, but now a huge positive number). - CVE-2015-8126 (arbitrary code execution) Buffer overflow vulnerabilities in functions png_get_PLTE/png_set_PLTE, allowing remote attackers to cause DoS to application or have unspecified other impact. These functions failed to check for an out-of-range palette when reading or writing PNG files with a bit_depth less than 8. Some applications might read the bit depth from the IHDR chunk and allocate memory for a 2^N entry palette, while libpng can return a palette with up to 256 entries even when the bit depth is less than 8. Impact ====== A remote attacker is able to create specially crafted png files that, when opened or processed, may lead to denial-of-service or possibly arbitrary code execution. References ========== https://access.redhat.com/security/cve/CVE-2015-7981 https://access.redhat.com/security/cve/CVE-2015-8126 http://seclists.org/oss-sec/2015/q4/161 http://seclists.org/oss-sec/2015/q4/264 https://bugs.archlinux.org/task/47069