CVE-2015-4471

This security update fixes the following issues:

• Fix possible infinite loop caused DoS (bsc919283, CVE-2014-9556)
• Fix zero dereference (bsc#934524, CVE-2014-9732)
• Fix off by one (bsc#934527, CVE-2015-4470)
• Fix buffer under-read crash (bsc#934528, CVE-2015-4471)

libmspack was updated to fix several security vulnerabilities.

• Fix null pointer dereference on a crafted CAB. (bsc#934524, CVE-2014-9732)
• Fix denial of service while processing crafted CHM file. (bsc#934525, CVE-2015-4467)
• Fix denial of service while processing crafted CHM file. (bsc#934529, CVE-2015-4472)
• Fix pointer arithmetic overflow during CHM decompression. (bsc#934526, CVE-2015-4469)
• Fix off-by-one buffer over-read in mspack/mszipd.c. (bsc#934527, CVE-2015-4470)
• Fix off-by-one buffer under-read in mspack/lzxd.c. (bsc#934528, CVE-2015-4471)

libmspack was updated to fix security issues.

These security issues were fixed:

• CVE-2014-9732: The cabd_extract function in cabd.c in libmspack did not properly maintain decompression callbacks in certain cases where an invalid file follows a valid file, which allowed remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted CAB archive (bnc#934524).
• CVE-2015-4467: The chmd_init_decomp function in chmd.c in libmspack did not properly validate the reset interval, which allowed remote attackers to cause a denial of service (divide-by-zero error and application crash) via a crafted CHM file (bnc#934525).
• CVE-2015-4468: Multiple integer overflows in the search_chunk function in chmd.c in libmspack allowed remote attackers to cause a denial of service (buffer over-read and application crash) via a crafted CHM file (bnc#934526).
• CVE-2015-4469: The chmd_read_headers function in chmd.c in libmspack did not validate name lengths, which allowed remote attackers to cause a denial of service (buffer over-read and application crash) via a crafted CHM file (bnc#934526).
• CVE-2015-4470: Off-by-one error in the inflate function in mszipd.c in libmspack allowed remote attackers to cause a denial of service (buffer over-read and application crash) via a crafted CAB archive (bnc#934527).
• CVE-2015-4471: Off-by-one error in the lzxd_decompress function in lzxd.c in libmspack allowed remote attackers to cause a denial of service (buffer under-read and application crash) via a crafted CAB archive (bnc#934528).
• CVE-2015-4472: Off-by-one error in the READ_ENCINT macro in chmd.c in libmspack allowed remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted CHM file (bnc#934529).

Off-by-one error in the lzxd_decompress function in lzxd.c in libmspack before 0.5 allows remote attackers to cause a denial of service (buffer under-read and application crash) via a crafted CAB archive.