ClamAV PDF Object Length Check Denial of Service Vulnerability [CVE-2018-0361]

CVE Number – CVE-2018-0361

A vulnerability in ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.

The vulnerability exists because the affected software does not perform a PDF object length check. An attacker could exploit this vulnerability by persuading a user on the targeted system to open a file. The affected software could take an unreasonable amount of time to parse even a small file, which could result in a DoS condition.

ClamAV confirmed the vulnerability and released software updates.

Analysis
  • To exploit this vulnerability, the attacker must have local access to the targeted system or persuade a user to open a file by using misleading language and instructions.
Safeguards
  • Administrators are advised to apply the appropriate updates.

    Administrators are advised to allow only trusted users to have network access.

    Users are advised not to open email messages from suspicious or unrecognized sources. If users cannot verify that links or attachments included in email messages are safe, they are advised not to open them.

    Users are advised not to visit websites or follow links that have suspicious characteristics or cannot be verified as safe.

    Administrators are advised to use an unprivileged account when browsing the Internet.

    Administrators are advised to monitor critical systems.

Vendor Announcements
Fixed Software
  • ClamAV released a software update at the following link: ClamAV 0.100.1




Duncan Newell

Duncan is a technology professional with over 20 years experience of working in various IT roles. He also has a wide range of other skills in radio, electronics and telecommunications.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: