Bug 662166 (CVE-2018-14679, CVE-2018-14680, CVE-2018-14681, CVE-2018-14682) – [TRACKER] libmspack: multiple vulnerabilities (CVE-2018-{14679,14680,14681,14682})

• Product: Gentoo Security
• Status: RESOLVED FIXED

[Description Hanno Böck 2018-07-26 07:12:41 UTC]

From the changelog of cabextract 1.7 + libmspack 0.7 alpha [1]:


* bad KWAJ file header extensions could cause a one or two byte
  overwrite
* The character U+0100 in a CHM filename could cause a one-byte overread
* libmspack now rejects blank CHM filenames.
* Fixed off-by-one error in CHM PMGI/PMGL chunk number validity checks, 
which could cause a crash by dereferencing uninitialised data beyond
  the end of the fast_find() chunk cache.

I think this code is shared in both packages, please bump.

[1] http://www.openwall.com/lists/oss-security/2018/07/26/1

[Comment 1 D'juan McDonald (domhnall) 2018-07-29 22:22:50 UTC]

Issue was assigned a CVE. https://nvd.nist.gov/vuln/detail/CVE-2018-14681

[Comment 2 D'juan McDonald (domhnall) 2018-07-29 22:31:33 UTC]

Correction, multiple CVEs have been assigned:

https://nvd.nist.gov/vuln/detail/CVE-2018-14679

An issue was discovered in mspack/chmd.c in libmspack before 0.7alpha. There is an off-by-one error in the CHM PMGI/PMGL chunk number validity checks, which could lead to denial of service (uninitialized data dereference and application crash).


https://nvd.nist.gov/vuln/detail/CVE-2018-14680
An issue was discovered in mspack/chmd.c in libmspack before 0.7alpha. It does not reject blank CHM filenames.

https://nvd.nist.gov/vuln/detail/CVE-2018-14681
An issue was discovered in kwajd_read_headers in mspack/kwajd.c in libmspack before 0.7alpha. Bad KWAJ file header extensions could cause a one or two byte overwrite.

https://nvd.nist.gov/vuln/detail/CVE-2018-14682
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.

[Comment 3 Thomas Deutschmann (RETIRED) 2018-08-05 21:54:48 UTC]

@ Hanno: I don't see security fixes in cabextract-1.7 release note. Looks like a normal release which adds new important features, but nothing for a security bug. Am I missing something?