HOMEVULNERABILITIESCVE-2017-6419
HIGH

CVE-2017-6419

CWE-119Published: August 7, 2017· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

mspack/lzxd.c in libmspack 0.5alpha, as used in ClamAV 0.99.2, allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted CHM file.

NVD Source

Technical Analysis

CVE-2017-6419 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors & Products

clamav1 product(s)
clamav
libmspack_project1 product(s)
libmspack
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/vrtadmin/clamav-devel/commit/a83773682e856ad6529ba6db8d1792e6d515d7f1
PATCHhttps://github.com/vrtadmin/clamav-devel/commit/a83773682e856ad6529ba6db8d1792e6d515d7f1
ADVISORYhttps://github.com/varsleak/varsleak-vul/blob/master/clamav-vul/heap-overflow/clamav_chm_crash.md
ADVISORYhttps://github.com/varsleak/varsleak-vul/blob/master/clamav-vul/heap-overflow/clamav_chm_crash.md

All References (12)

→
http://www.debian.org/security/2017/dsa-3946
→
https://bugzilla.clamav.net/show_bug.cgi?id=11701Issue Tracking
→
https://github.com/varsleak/varsleak-vul/blob/master/clamav-vul/heap-overflow/clamav_chm_crash.mdThird Party Advisory
→
https://github.com/vrtadmin/clamav-devel/commit/a83773682e856ad6529ba6db8d1792e6d515d7f1Issue Tracking · Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2018/02/msg00014.html
→
https://security.gentoo.org/glsa/201804-16
→
http://www.debian.org/security/2017/dsa-3946
→
https://bugzilla.clamav.net/show_bug.cgi?id=11701Issue Tracking
→
https://github.com/varsleak/varsleak-vul/blob/master/clamav-vul/heap-overflow/clamav_chm_crash.mdThird Party Advisory
→
https://github.com/vrtadmin/clamav-devel/commit/a83773682e856ad6529ba6db8d1792e6d515d7f1Issue Tracking · Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2018/02/msg00014.html
→
https://security.gentoo.org/glsa/201804-16

Quick Facts

CVE IDCVE-2017-6419
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-119
CISA KEVNo
Affected2 vendor(s)
PublishedAug 7, 2017

Related CVEs (CWE-119)

CVE-2004-0234
10.0
CVE-2005-4865
10.0
CVE-2004-0368
10.0
CVE-2004-0220
10.0
CVE-2004-0836
10.0
CVE-2009-0012
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2017-6419 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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