=========================================================================Ubuntu Security Notice USN-4602-2
October 27, 2020
perl vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM
Summary:
Several security issues were fixed in Perl.
Software Description:
- perl: Practical Extraction and Report Language
Details:
USN-4602-1 fixed several vulnerabilities in Perl. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
Original advisory details:
ManhND discovered that Perl incorrectly handled certain regular
expressions. In environments where untrusted regular expressions are
evaluated, a remote attacker could possibly use this issue to cause Perl to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2020-10543)
Hugo van der Sanden and Slaven Rezic discovered that Perl incorrectly
handled certain regular expressions. In environments where untrusted
regular expressions are evaluated, a remote attacker could possibly use
this issue to cause Perl to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2020-10878)
Sergey Aleynikov discovered that Perl incorrectly handled certain regular
expressions. In environments where untrusted regular expressions are
evaluated, a remote attacker could possibly use this issue to cause Perl to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2020-12723)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 14.04 ESM:
perl 5.18.2-2ubuntu1.7+esm3
Ubuntu 12.04 ESM:
perl 5.14.2-6ubuntu2.11
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-4602-2
https://ubuntu.com/security/notices/USN-4602-1
CVE-2020-10543, CVE-2020-10878, CVE-2020-12723
