CVE-2018-0202 Denial of service in ClamAV

What is CVE-2018-0202?

CVE-2018-0202 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 27 Mar 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

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.

Weakness: CWE-125

Which versions are affected by CVE-2018-0202?

It affects 3 products.

Products include Canonical Ubuntu Linux, Clamav Clamav, Debian Debian Linux.

How do I fix CVE-2018-0202?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2018-0202 being exploited?

There is no known exploitation of CVE-2018-0202 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2018-0202, CLEANSTART-2026-CA69307, DEBIAN-CVE-2018-0202, GHSA-r382-prm5-5rqf, UBUNTU-CVE-2018-0202.