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Ubuntu Security Notice USN-4602-1

Ubuntu Security Notice USN-4602-1
Posted Oct 26, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4602-1 - 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. 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. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary, perl
systems | linux, ubuntu
advisories | CVE-2020-10543, CVE-2020-10878, CVE-2020-12723
SHA-256 | d25f9b9d4ca7ae202dc5ae8297633524adb09b4dec99f80f5ce8e5ff0fc1c2a6

Ubuntu Security Notice USN-4602-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4602-1
October 26, 2020

perl vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Perl.

Software Description:
- perl: Practical Extraction and Report Language

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 20.04 LTS:
perl 5.30.0-9ubuntu0.2

Ubuntu 18.04 LTS:
perl 5.26.1-6ubuntu0.5

Ubuntu 16.04 LTS:
perl 5.22.1-9ubuntu0.9

In general, a standard system update will make all the necessary changes.

References:
https://usn.ubuntu.com/4602-1
CVE-2020-10543, CVE-2020-10878, CVE-2020-12723

Package Information:
https://launchpad.net/ubuntu/+source/perl/5.30.0-9ubuntu0.2
https://launchpad.net/ubuntu/+source/perl/5.26.1-6ubuntu0.5
https://launchpad.net/ubuntu/+source/perl/5.22.1-9ubuntu0.9

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