Bug 1644214 (CVE-2018-18584)

Summary: CVE-2018-18584 libmspack: Out-of-bounds write in mspack/cab.h
Product: [Other] Security Response Reporter: Andrej Nemec <anemec>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dan, janfrode, jorti, ldu, ms, rjones
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: libmspack 0.8, cabextract 1.8 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-08-06 19:19:54 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1644218, 1644219, 1644220, 1644221, 1644222, 1648384    
Bug Blocks: 1644217    

Description Andrej Nemec 2018-10-30 09:22:53 UTC 
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.

Upstream patch:

https://github.com/kyz/libmspack/commit/40ef1b4093d77ad3a5cfcee1f5cb6108b3a3bcc2

References:

https://www.openwall.com/lists/oss-security/2018/10/22/1
Comment 1 Andrej Nemec 2018-10-30 09:30:16 UTC 
Created cabextract tracking bugs for this issue:

Affects: epel-all [bug 1644222]
Affects: fedora-all [bug 1644221]


Created libmspack tracking bugs for this issue:

Affects: epel-all [bug 1644219]
Affects: fedora-all [bug 1644218]
Comment 4 Stefan Cornelius 2018-11-09 15:12:49 UTC 
Statement:

This issue affects the versions of libmspack as shipped with Red Hat Enterprise Linux 7.
Comment 8 errata-xmlrpc 2019-08-06 12:07:29 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:2049 https://access.redhat.com/errata/RHSA-2019:2049
Comment 9 Product Security DevOps Team 2019-08-06 19:19:54 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2018-18584