ESB-2018.0418 - [UNIX/Linux][Debian] exim4: Execute arbitrary code/commands - Remote/unauthenticated 2018-02-12

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

                               ESB-2018.0418
                           exim4 security update
                             12 February 2018

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

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

Product:           exim4
Publisher:         Debian
Operating System:  Debian GNU/Linux 8
                   Debian GNU/Linux 9
                   Debian GNU/Linux 7
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-6789  

Original Bulletin: 
   http://www.debian.org/security/2018/dsa-4110
   https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Debian. It is recommended that administrators 
         running exim4 check for an updated version of the software for their
         operating system.
         
         This bulletin contains two (2) Debian security advisories.

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- - -------------------------------------------------------------------------
Debian Security Advisory DSA-4110-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
February 10, 2018                     https://www.debian.org/security/faq
- - -------------------------------------------------------------------------

Package        : exim4
CVE ID         : CVE-2018-6789
Debian Bug     : 890000

Meh Chang discovered a buffer overflow flaw in a utility function used
in the SMTP listener of Exim, a mail transport agent. A remote attacker
can take advantage of this flaw to cause a denial of service, or
potentially the execution of arbitrary code via a specially crafted
message.

For the oldstable distribution (jessie), this problem has been fixed
in version 4.84.2-2+deb8u5.

For the stable distribution (stretch), this problem has been fixed in
version 4.89-2+deb9u3.

We recommend that you upgrade your exim4 packages.

For the detailed security status of exim4 please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/exim4

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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Package        : exim4
Version        : 4.80-7+deb7u6
CVE ID         : CVE-2018-6789
Debian Bug     : 890000

Meh Chang discovered a buffer overflow flaw in a utility function used
in the SMTP listener of Exim, a mail transport agent. A remote attacker
can take advantage of this flaw to cause a denial of service, or
potentially the execution of arbitrary code via a specially crafted
message.

For Debian 7 "Wheezy", this problem has been fixed in version
4.80-7+deb7u6.

We recommend that you upgrade your exim4 packages.

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