Ubuntu 20.10 USN-4918-1 Critical ClamAV Denial Of Service Advisory

ubuntu

April 19, 2021

Several security issues were fixed in ClamAV.

Summary

Several security issues were fixed in ClamAV.

Software Description:

- clamav: Anti-virus utility for Unix

Details:

It was discovered that ClamAV incorrectly handled parsing Excel documents.

A remote attacker could possibly use this issue to cause ClamAV to hang,

resulting in a denial of service. (CVE-2021-1252)

It was discovered that ClamAV incorrectly handled parsing PDF documents. A

remote attacker could possibly use this issue to cause ClamAV to crash,

resulting in a denial of service. (CVE-2021-1404)

It was discovered that ClamAV incorrectly handled parsing email. A remote

attacker could possibly use this issue to cause ClamAV to crash, resulting

in a denial of service. (CVE-2021-1405)

Topics Covered

security advisory denial of service critical issue software update Ubuntu Denial of Service ubuntu clamav ClamAV error handling usn-4918-1

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.10:
  clamav                          0.103.2+dfsg-0ubuntu0.20.10.1

Ubuntu 20.04 LTS:
  clamav                          0.103.2+dfsg-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
  clamav                          0.103.2+dfsg-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
  clamav                          0.103.2+dfsg-0ubuntu0.16.04.1

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.