This update for libmspack fixes the following issues: - CVE-2018-14681: Bad KWAJ file header extensions could cause a one or two byte overwrite. - CVE-2018-14682: There is an off-by-one error in the TOLOWER macro for CHM decompression. - CVE-2018-14679: There is an off-by-one error in the CHM PMGI/PMGL chunk number validity checks, which could lead to denial of service