Arch Linux Security Advisory ASA-201802-9 ========================================= Severity: Critical Date : 2018-02-20 CVE-ID : CVE-2017-6419 CVE-2017-11423 Package : libmspack Type : multiple issues Remote : Yes Link : https://security.archlinux.org/AVG-603 Summary ======= The package libmspack before version 1:0.6alpha-1 is vulnerable to multiple issues including arbitrary code execution and denial of service. Resolution ========== Upgrade to 1:0.6alpha-1. # pacman -Syu "libmspack>=1:0.6alpha-1" The problems have been fixed upstream in version 0.6alpha. Workaround ========== None. Description =========== - CVE-2017-6419 (arbitrary code execution) mspack/lzxd.c in libmspack 0.5alpha, as used in ClamAV before 0.99.3, allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly execute arbitrary code via a crafted CHM file. - CVE-2017-11423 (denial of service) The cabd_read_string function in mspack/cabd.c in libmspack 0.5alpha, as used in ClamAV before 0.99.3 and other products, allows remote attackers to cause a denial of service (stack-based buffer over-read and application crash) via a crafted CAB file. Impact ====== A remote attacker is able to crash the application or execute arbitrary code by providing a maliciously-crafted file. References ========== https://bugzilla.clamav.net/show_bug.cgi?id=11701 https://github.com/vrtadmin/clamav-devel/commit/a83773682e856ad6529ba6db8d17... https://github.com/kyz/libmspack/commit/6139a0b9e93fcb7fcf423e56aa825bc869e0... https://bugzilla.clamav.net/show_bug.cgi?id=11873 https://github.com/kyz/libmspack/commit/17038206fcc384dcee6dd9e3a75f08fd3ddc... https://github.com/vrtadmin/clamav-devel/commit/ffa31264a657618a0e40c51c01e4... https://github.com/vrtadmin/clamav-devel/commit/ada5f94e5cfb04e1ac2a6f383f21... https://github.com/hackerlib/hackerlib-vul/tree/master/clamav-vul https://security.archlinux.org/CVE-2017-6419 https://security.archlinux.org/CVE-2017-11423