libmspack up to 0.4 CHM File chmd.c chmd_read_headers memory corruption
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
4.6 | $0-$5k | 0.00 |
A vulnerability was found in libmspack up to 0.4 and classified as critical. Affected by this issue is the function chmd_read_headers
of the file chmd.c of the component CHM File Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is availability. CVE summarizes:
The chmd_read_headers function in chmd.c in libmspack before 0.5 does not validate name lengths, which allows remote attackers to cause a denial of service (buffer over-read and application crash) via a crafted CHM file.
The weakness was presented 06/11/2015 by Jakub Wilk as confirmed mailinglist post (oss-sec). The advisory is shared for download at seclists.org. This vulnerability is handled as CVE-2015-4469 since 06/10/2015. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.
The vulnerability scanner Nessus provides a plugin with the ID 87276 (SUSE SLED11 / SLES11 Security Update : libmspack (SUSE-SU-2015:2215-1)), 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 7 months after the disclosure of the vulnerability.
The vulnerability is also documented in the databases at X-Force (103800) and Tenable (87276). See 75845, 75846, 75847 and 75849 for similar entries.
Product
Name
Version
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
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CVSSv3
VulDB Meta Base Score: 5.3VulDB Meta Temp Score: 4.6
VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
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Exploiting
Class: Memory corruptionCWE: CWE-119
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔍
Status: Unproven
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0-Day | unlock | unlock | unlock | unlock |
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Nessus ID: 87276
Nessus Name: SUSE SLED11 / SLES11 Security Update : libmspack (SUSE-SU-2015:2215-1)
Nessus File: 🔍
Nessus Risk: 🔍
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Nessus Context: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
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Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Upgrade: libmspack 0.5
Timeline
02/04/2015 🔍02/04/2015 🔍
06/10/2015 🔍
06/11/2015 🔍
06/11/2015 🔍
06/12/2015 🔍
12/07/2015 🔍
12/09/2015 🔍
01/19/2016 🔍
07/05/2018 🔍
Sources
Advisory: seclists.orgResearcher: Jakub Wilk
Status: Confirmed
Confirmation: 🔍
CVE: CVE-2015-4469 (🔍)
X-Force: 103800 - libmspack CHM file buffer overflow
Vulnerability Center: 55751 - libmspack <0.5 Remote DoS due to Improper Filename Length via CHM File, Medium
SecurityFocus: 72486 - Libmspack Out Of Bounds Read Multiple Memory Corruption Vulnerabilities
See also: 🔍
Entry
Created: 06/12/2015 10:34Updated: 07/05/2018 09:01
Changes: 06/12/2015 10:34 (64), 07/05/2018 09:01 (15)
Complete: 🔍
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