libmspack 0.9.1alpha is affected by: Buffer Overflow. The impact is: Information Disclosure. The component is: function chmd_read_headers() in libmspack(file libmspack/mspack/chmd.c). The attack vector is: the victim must open a specially crafted chm file. The fixed version is: after commit 2f084136cfe0d05e5bf5703f3e83c6d955234b4d.
https://usn.ubuntu.com/4066-2/
https://usn.ubuntu.com/4066-1/
https://lists.debian.org/debian-lts-announce/2021/10/msg00033.html
https://lists.debian.org/debian-lts-announce/2019/08/msg00028.html
https://github.com/kyz/libmspack/issues/27
https://github.com/kyz/libmspack/commit/2f084136cfe0d05e5bf5703f3e83c6d955234b4d