HOMEVULNERABILITIESCVE-2018-0202
MEDIUM

CVE-2018-0202

CWE-125Published: March 27, 2018· Updated: Jun 17, 2026

5.5
CVSS v3.1

Official Description

clamscan in ClamAV before 0.99.4 contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper input validation checking mechanisms when handling Portable Document Format (.pdf) files sent to an affected device. An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted .pdf file to an affected device. This action could cause an out-of-bounds read when ClamAV scans the malicious file, allowing the attacker to cause a DoS condition. This concerns pdf_parse_array and pdf_parse_string in libclamav/pdfng.c. Cisco Bug IDs: CSCvh91380, CSCvh91400.

NVD Source

Technical Analysis

CVE-2018-0202 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 availability disruption (denial of service), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

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

Affected Vendors & Products

Canonical1 product(s)
ubuntu linux
clamav1 product(s)
clamav
Debian1 product(s)
debian linux
Source: NVD CPE · 6 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://bugzilla.clamav.net/show_bug.cgi?id=11973
PATCHhttps://bugzilla.clamav.net/show_bug.cgi?id=11973
ADVISORYhttps://bugzilla.clamav.net/show_bug.cgi?id=11980
ADVISORYhttps://lists.debian.org/debian-lts-announce/2018/03/msg00011.html
ADVISORYhttps://security.gentoo.org/glsa/201804-16
ADVISORYhttps://usn.ubuntu.com/3592-1/
ADVISORYhttps://usn.ubuntu.com/3592-2/
ADVISORYhttps://bugzilla.clamav.net/show_bug.cgi?id=11980
ADVISORYhttps://lists.debian.org/debian-lts-announce/2018/03/msg00011.html
ADVISORYhttps://security.gentoo.org/glsa/201804-16
ADVISORYhttps://usn.ubuntu.com/3592-1/
ADVISORYhttps://usn.ubuntu.com/3592-2/

All References (12)

→
https://bugzilla.clamav.net/show_bug.cgi?id=11973Issue Tracking · Patch · Third Party Advisory
→
https://bugzilla.clamav.net/show_bug.cgi?id=11980Issue Tracking · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2018/03/msg00011.htmlMailing List · Third Party Advisory
→
https://security.gentoo.org/glsa/201804-16Third Party Advisory
→
https://usn.ubuntu.com/3592-1/Third Party Advisory
→
https://usn.ubuntu.com/3592-2/Third Party Advisory
→
https://bugzilla.clamav.net/show_bug.cgi?id=11973Issue Tracking · Patch · Third Party Advisory
→
https://bugzilla.clamav.net/show_bug.cgi?id=11980Issue Tracking · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2018/03/msg00011.htmlMailing List · Third Party Advisory
→
https://security.gentoo.org/glsa/201804-16Third Party Advisory
→
https://usn.ubuntu.com/3592-1/Third Party Advisory
→
https://usn.ubuntu.com/3592-2/Third Party Advisory

Quick Facts

CVE IDCVE-2018-0202
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-125
CISA KEVNo
Affected3 vendor(s)
PublishedMar 27, 2018

Related CVEs (CWE-125)

CVE-2021-21777
10.0
CVE-2021-41556
10.0
CVE-2009-2523
10.0
CVE-2013-0767
10.0
CVE-2017-14451
10.0
CVE-2026-34987
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-0202 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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