CVE-2018-14682

Description

An issue was discovered in mspack/chmd.c in libmspack before 0.7alpha. There is an off-by-one error in the TOLOWER() macro for CHM decompression.

Link	Tags
https://usn.ubuntu.com/3728-3/	third party advisory vendor advisory
https://www.debian.org/security/2018/dsa-4260	third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2018/08/msg00007.html	third party advisory mailing list
https://bugs.debian.org/904800	issue tracking mailing list patch third party advisory
http://www.openwall.com/lists/oss-security/2018/07/26/1	third party advisory mailing list
https://access.redhat.com/errata/RHSA-2018:3505	third party advisory vendor advisory
https://usn.ubuntu.com/3789-2/	third party advisory vendor advisory
https://usn.ubuntu.com/3728-2/	third party advisory vendor advisory
http://www.securitytracker.com/id/1041410	vdb entry third party advisory
https://github.com/kyz/libmspack/commit/4fd9ccaa54e1aebde1e4b95fb0163b699fd7bcc8	third party advisory patch
https://usn.ubuntu.com/3728-1/	third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2018:3327	third party advisory vendor advisory
https://security.gentoo.org/glsa/201903-20	third party advisory vendor advisory

What is the severity of CVE-2018-14682?: CVE-2018-14682 has been scored as a high severity vulnerability.
How to fix CVE-2018-14682?: To fix CVE-2018-14682, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-14682 being actively exploited in the wild?: It is possible that CVE-2018-14682 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.