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AUSCERT External Security Bulletin Redistribution
ESB-2017.2069
ClamAV vulnerabilities
18 August 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: clamav
Publisher: Ubuntu
Operating System: Ubuntu
Linux variants
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2017-6420 CVE-2017-6419 CVE-2017-6418
Original Bulletin:
http://www.ubuntu.com/usn/usn-3393-1
http://www.ubuntu.com/usn/usn-3393-2
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running clamav check for an updated version of the software for
their operating system.
This bulletin contains two (2) Ubuntu security advisories.
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Ubuntu Security Notice USN-3393-1
August 17, 2017
clamav vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 17.04
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS
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 certain e-mail
messages. A remote attacker could possibly use this issue to cause ClamAV
to crash, resulting in a denial of service. (CVE-2017-6418)
It was discovered that ClamAV incorrectly handled certain malformed CHM
files. A remote attacker could use this issue to cause ClamAV to crash,
resulting in a denial of service, or possibly execute arbitrary code. This
issue only affected Ubuntu 14.04 LTS. In the default installation,
attackers would be isolated by the ClamAV AppArmor profile. (CVE-2017-6419)
It was discovered that ClamAV incorrectly handled parsing certain PE files
with WWPack compression. A remote attacker could possibly use this issue to
cause ClamAV to crash, resulting in a denial of service. (CVE-2017-6420)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 17.04:
clamav 0.99.2+dfsg-6ubuntu0.1
Ubuntu 16.04 LTS:
clamav 0.99.2+dfsg-0ubuntu0.16.04.2
Ubuntu 14.04 LTS:
clamav 0.99.2+addedllvm-0ubuntu0.14.04.2
In general, a standard system update will make all the necessary changes.
References:
https://www.ubuntu.com/usn/usn-3393-1
CVE-2017-6418, CVE-2017-6419, CVE-2017-6420
Package Information:
https://launchpad.net/ubuntu/+source/clamav/0.99.2+dfsg-6ubuntu0.1
https://launchpad.net/ubuntu/+source/clamav/0.99.2+dfsg-0ubuntu0.16.04.2
https://launchpad.net/ubuntu/+source/clamav/0.99.2+addedllvm-0ubuntu0.14.04.2
==========================================================================
Ubuntu Security Notice USN-3393-2
August 17, 2017
clamav vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 12.04 ESM
Summary:
Several security issues were fixed in ClamAV.
Software Description:
- - clamav: Anti-virus utility for Unix
Details:
USN-3393-1 fixed several vulnerabilities in ClamAV. This update
provides the corresponding update for Ubuntu 12.04 ESM.
Original advisory details:
It was discovered that ClamAV incorrectly handled parsing certainÂ
e- mail messages. A remote attacker could possibly use this issue to
cause ClamAV to crash, resulting in a denial of service.Â
(CVE-2017-6418)
Â
It was discovered that ClamAV incorrectly handled certain malformed
CHM files. A remote attacker could use this issue to cause ClamAV to
crash, resulting in a denial of service, or possibly execute arbitrary
code. This issue only affected Ubuntu 14.04 LTS. In the default
installation, attackers would be isolated by the ClamAV AppArmor
profile. (CVE-2017-6419)
It was discovered that ClamAV incorrectly handled parsing certain PE
files with WWPack compression. A remote attacker could possibly use
this issue to cause ClamAV to crash, resulting in a denial of service.
(CVE-2017-6420)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 ESM:
 clamav 0.99.2+addedllvm-0ubuntu0.12.04.2
In general, a standard system update will make all the necessary
changes.
References:
 https://www.ubuntu.com/usn/usn-3393-2
 https://www.ubuntu.com/usn/usn-3393-1
 CVE-2017-6418, CVE-2017-6419, CVE-2017-6420
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