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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.1523
                       USN-4918-3: ClamAV regression
                                5 May 2021

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           ClamAV
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-1405 CVE-2021-1404 CVE-2021-1252

Reference:         ESB-2021.1345
                   ESB-2021.1271
                   ESB-2021.1237

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-4918-3

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USN-4918-3: ClamAV regression
03 May 2021

USN-4918-1 introduced a regression in ClamAV that could cause it to fail to scan.
Releases

  o Ubuntu 21.04
  o Ubuntu 20.10
  o Ubuntu 20.04 LTS
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 ESM
  o Ubuntu 14.04 ESM

Packages

  o clamav - Anti-virus utility for Unix

Details

USN-4918-1 fixed vulnerabilities in ClamAV. The updated package could
fail to properly scan in some situations. This update fixes
the problem.

Original advisory 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 )

Update instructions

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

Ubuntu 21.04

  o clamav - 0.103.2+dfsg-1ubuntu0.21.04.1
  o libclamav9 - 0.103.2+dfsg-1ubuntu0.21.04.1

Ubuntu 20.10

  o clamav - 0.103.2+dfsg-0ubuntu0.20.10.2
  o libclamav9 - 0.103.2+dfsg-0ubuntu0.20.10.2

Ubuntu 20.04

  o clamav - 0.103.2+dfsg-0ubuntu0.20.04.2
  o libclamav9 - 0.103.2+dfsg-0ubuntu0.20.04.2

Ubuntu 18.04

  o clamav - 0.103.2+dfsg-0ubuntu0.18.04.2
  o libclamav9 - 0.103.2+dfsg-0ubuntu0.18.04.2

Ubuntu 16.04

  o clamav - 0.103.2+dfsg-0ubuntu0.16.04.1+esm1
    Available with UA Infra or UA Desktop
  o libclamav9 - 0.103.2+dfsg-0ubuntu0.16.04.1+esm1
    Available with UA Infra or UA Desktop

Ubuntu 14.04

  o clamav - 0.103.2+dfsg-0ubuntu0.14.04.1+esm2
    Available with UA Infra or UA Desktop
  o libclamav9 - 0.103.2+dfsg-0ubuntu0.14.04.1+esm2
    Available with UA Infra or UA Desktop

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

References

  o https://launchpad.net/bugs/1926300

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