libmspack up to 0.4 CHM File chmd.c search_chunk numeric error

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in libmspack up to 0.4. This affects the function search_chunk of the file chmd.c of the component CHM File Handler. This manipulation causes numeric error. This vulnerability is tracked as CVE-2015-4468. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in libmspack up to 0.4 and classified as critical. Affected by this vulnerability is the function search_chunk of the file chmd.c of the component CHM File Handler. The manipulation with an unknown input leads to a numeric error vulnerability. The CWE definition for the vulnerability is CWE-189. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Multiple integer overflows in the search_chunk function in chmd.c in libmspack before 0.5 allow remote attackers to cause a denial of service (buffer over-read and application crash) via a crafted CHM file.

The weakness was disclosed 06/11/2015 by Jakub Wilk as confirmed mailinglist post (oss-sec). It is possible to read the advisory at seclists.org. This vulnerability is known as CVE-2015-4468 since 06/10/2015. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 87858 (SUSE SLED12 / SLES12 Security Update : libmspack (SUSE-SU-2016:0011-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168364 (SUSE Enterprise Linux Security update for libmspack (SUSE-SU-2016:0011-1)).

Upgrading to version 0.5 eliminates this vulnerability. A possible mitigation has been published 8 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (103799), Tenable (87858), SecurityFocus (BID 72486†) and Vulnerability Center (SBV-55748†). The entries VDB-75845, VDB-75846, VDB-75848 and VDB-75849 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.4

VulDB Base Score: 7.3
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 87858
Nessus Name: SUSE SLED12 / SLES12 Security Update : libmspack (SUSE-SU-2016:0011-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: libmspack 0.5

Timelineinfo

02/04/2015 🔍
02/04/2015 +0 days 🔍
06/10/2015 +126 days 🔍
06/11/2015 +1 days 🔍
06/11/2015 +0 days 🔍
06/12/2015 +1 days 🔍
01/04/2016 +206 days 🔍
01/12/2016 +8 days 🔍
01/19/2016 +7 days 🔍
07/05/2018 +898 days 🔍

Sourcesinfo

Advisory: seclists.org
Researcher: Jakub Wilk
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-4468 (🔍)
GCVE (CVE): GCVE-0-2015-4468
GCVE (VulDB): GCVE-100-75847
X-Force: 103799 - libmspack CHM decompression buffer overflow
SecurityFocus: 72486 - Libmspack Out Of Bounds Read Multiple Memory Corruption Vulnerabilities
Vulnerability Center: 55748 - libmspack <0.5 Remote DoS CHM Decompression due to Integer Overflow, Medium

See also: 🔍

Entryinfo

Created: 06/12/2015 10:34
Updated: 07/05/2018 09:00
Changes: 06/12/2015 10:34 (63), 07/05/2018 09:00 (16)
Complete: 🔍
Cache ID: 216:68E:103

Be aware that VulDB is the high quality source for vulnerability data.

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