Bug 1610890 – CVE-2018-14679 libmspack: off-by-one error in the CHM PMGI/PMGL chunk number validity checks

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Bug 1610890 - (CVE-2018-14679) CVE-2018-14679 libmspack: off-by-one error in the CHM PMGI/PMGL chunk number validity checks

Summary:	CVE-2018-14679 libmspack: off-by-one error in the CHM PMGI/PMGL chunk number ...

Status:	NEW

Aliases:	CVE-2018-14679

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=low,public=20180512,reported=2...
Keywords:	Security

Depends On:	1610893 1610891 1610932 1611550
Blocks:	1610945
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Reported:	2018-08-01 10:46 EDT by Laura Pardo
Modified:	2018-10-30 03:59 EDT (History)
CC List:	5 users (show)

See Also:
Fixed In Version:	libmspack 0.7alpha
Doc Type:	If docs needed, set a value
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Last Closed:
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Regression:	---
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oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2018:3327	None	None	None	2018-10-30 03:59 EDT

Groups: None (edit)

Description Laura Pardo 2018-08-01 10:46:29 EDT

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)


References:
http://openwall.com/lists/oss-security/2018/07/28/1
https://bugs.debian.org/904802

Upstream patch:
https://github.com/kyz/libmspack/commit/72e70a921f0f07fee748aec2274b30784e1d312a

Comment 1 Laura Pardo 2018-08-01 10:46:53 EDT

Created libmspack tracking bugs for this issue:

Affects: fedora-all [bug 1610891]

Comment 4 Laura Pardo 2018-08-01 12:25:49 EDT

Created libmspack tracking bugs for this issue:

Affects: epel-all [bug 1610932]

Comment 6 Stefan Cornelius 2018-08-02 06:38:53 EDT

Statement:

This issue affects the versions of libmspack as shipped with Red Hat Enterprise Linux 7.

Comment 8 errata-xmlrpc 2018-10-30 03:59:36 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3327 https://access.redhat.com/errata/RHSA-2018:3327

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