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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                              ESB-2017.2402.2
                           perl security update
                             14 November 2017

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           perl
Publisher:         Debian
Operating System:  Debian GNU/Linux 8
                   Debian GNU/Linux 9
                   UNIX variants (UNIX, Linux, OSX)
                   Windows
Impact/Access:     Denial of Service        -- Remote/Unauthenticated
                   Access Confidential Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-12883 CVE-2017-12837 

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3478-2

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Debian. It is recommended that administrators 
         running perl check for an updated version of the software for their
         operating system.

Revision History:  November  14 2017: Patch released for Ubuntu 12.04 ESM.
                   September 22 2017: Initial Release

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==========================================================================
Ubuntu Security Notice USN-3478-2
November 13, 2017

perl vulnerability
==========================================================================

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

- - Ubuntu 12.04 ESM

Summary:

Perl could be made to crash if it received specially crafted
input.

Software Description:
- - perl: Practical Extraction and Report Language

Details:

USN-3478-1 fixed two vulnerabilities in Perl. This update
provides the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 Jakub Wilk discovered that Perl incorrectly handled certain regular
 expressions. An attacker could use this issue to cause Perl to crash,
 resulting in a denial of service, or possibly execute arbitrary code.
 (CVE-2017-12883)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 ESM:
  perl                            5.14.2-6ubuntu2.6

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

References:
  https://www.ubuntu.com/usn/usn-3478-2
  https://www.ubuntu.com/usn/usn-3478-1
  CVE-2017-12883


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- - -------------------------------------------------------------------------
Debian Security Advisory DSA-3982-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
September 21, 2017                    https://www.debian.org/security/faq
- - -------------------------------------------------------------------------

Package        : perl
CVE ID         : CVE-2017-12837 CVE-2017-12883
Debian Bug     : 875596 875597

Multiple vulnerabilities were discovered in the implementation of the
Perl programming language. The Common Vulnerabilities and Exposures
project identifies the following problems:

CVE-2017-12837

    Jakub Wilk reported a heap buffer overflow flaw in the regular
    expression compiler, allowing a remote attacker to cause a denial of
    service via a specially crafted regular expression with the
    case-insensitive modifier.

CVE-2017-12883

    Jakub Wilk reported a buffer over-read flaw in the regular
    expression parser, allowing a remote attacker to cause a denial of
    service or information leak.

For the oldstable distribution (jessie), these problems have been fixed
in version 5.20.2-3+deb8u9.

For the stable distribution (stretch), these problems have been fixed in
version 5.24.1-3+deb9u2.

For the testing distribution (buster), these problems have been fixed
in version 5.26.0-8.

For the unstable distribution (sid), these problems have been fixed in
version 5.26.0-8.

We recommend that you upgrade your perl packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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