Vulnerability CVE-2019-1010305


Published: 2019-07-15

Description:
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.

Type:

CWE-119

(Improper Restriction of Operations within the Bounds of a Memory Buffer)

Vendor: Fedoraproject
Product: Fedora 
Version: 30; 29;
Vendor: Canonical
Product: Ubuntu linux 
Version:
18.04
16.04
14.04
12.04
Vendor: Kyzer
Product: Libmspack 
Version: 0.9.1;

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None

 References:
https://github.com/kyz/libmspack/commit/2f084136cfe0d05e5bf5703f3e83c6d955234b4d
https://github.com/kyz/libmspack/issues/27
https://lists.debian.org/debian-lts-announce/2019/08/msg00028.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IXWNEY4CJBLPRKV6LG7FQUPD6WVZYBTB/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S2QJTUAGP22YY7453MHGTFN4YQE5HJBR/
https://usn.ubuntu.com/4066-1/
https://usn.ubuntu.com/4066-2/

Related CVE
CVE-2018-18586
** DISPUTED ** chmextract.c in the chmextract sample program, as distributed with libmspack before 0.8alpha, does not protect against absolute/relative pathnames in CHM files, leading to Directory Traversal. NOTE: the vendor disputes that this is a l...
CVE-2018-18585
chmd_read_headers in mspack/chmd.c in libmspack before 0.8alpha accepts a filename that has '\0' as its first or second character (such as the "/\0" name).
CVE-2018-18584
In mspack/cab.h in libmspack before 0.8alpha and cabextract before 1.8, the CAB block input buffer is one byte too small for the maximal Quantum block, leading to an out-of-bounds write.

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