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Ubuntu Security Notice USN-4602-2

Ubuntu Security Notice USN-4602-2
Posted Oct 27, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4602-2 - USN-4602-1 fixed several vulnerabilities in Perl. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. 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. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary, perl, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-10543, CVE-2020-10878, CVE-2020-12723
MD5 | 549f62bb06239388f75ae227d8f0e23c

Ubuntu Security Notice USN-4602-2

Change Mirror Download
=========================================================================
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://usn.ubuntu.com/4602-2
https://usn.ubuntu.com/4602-1
CVE-2020-10543, CVE-2020-10878, CVE-2020-12723
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