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AUSCERT External Security Bulletin Redistribution
20 April 2018
AusCERT Security Bulletin Summary
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Modify Permissions -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Read-only Data Access -- Remote with User Interaction
CVE Names: CVE-2018-6913 CVE-2018-6798 CVE-2018-6797
CVE-2017-6512 CVE-2016-6185 CVE-2015-8853
Revision History: April 20 2018: Update to include Ubuntu 12.04 ESM
April 17 2018: Initial Release
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USN-3625-2: Perl vulnerabilities
17 April 2018
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 12.04 ESM
Several security issues were fixed in Perl.
o perl - Practical Extraction and Report Language
USN-3625-1 fixed a vulnerability in Perl. This update provides the
corresponding update for Ubuntu 12.04 ESM.
Original advisory details:
It was discovered that Perl incorrectly handled certain regular expressions. An
attacker could possibly use this issue to cause Perl to hang, resulting in a
denial of service. (CVE-2015-8853)
It was discovered that Perl incorrectly loaded libraries from the current
working directory. A local attacker could possibly use this issue to execute
arbitrary code. (CVE-2016-6185)
It was discovered that Perl incorrectly handled the rmtree and remove_tree
functions. A local attacker could possibly use this issue to set the mode on
arbitrary files. (CVE-2017-6512)
GwanYeong Kim discovered that Perl incorrectly handled certain data when using
the pack function. An attacker could use this issue to cause Perl to crash,
resulting in a denial of service, or possibly execute arbitrary code.
The problem can be corrected by updating your system to the following package
Ubuntu 12.04 ESM
perl - 5.14.2-6ubuntu2.7
To update your system, please follow these instructions: https://
In general, a standard system update will make all the necessary changes.
(C) 2017 Canonical Ltd. Ubuntu and Canonical are registered trademarks of
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