SUSE-SU-2020:2711-1

This update for libmspack fixes the following issues:

Security issues fixed:

• CVE-2019-1010305: Fixed a buffer overflow triggered by a crafted chm file which could have led to information disclosure (bsc#1141680).
• CVE-2018-18584: The CAB block input buffer was one byte too small for the maximal Quantum block, leading to an out-of-bounds write. (bsc#1113038)
• CVE-2018-18585: chmdreadheaders accepted a filename that has '\0' as its first or second character (such as the '/\0' name). (bsc#1113039)
• Fix off-by-one bounds check on CHM PMGI/PMGL chunk numbers and reject empty filenames.