ESB-2018.0349 - [UNIX/Linux][Debian] p7zip: Execute arbitrary code/commands - Remote with user interaction 2018-02-05

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.0349
                           p7zip security update
                              5 February 2018

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

Product:           p7zip
Publisher:         Debian
Operating System:  Debian GNU/Linux 9
                   Debian GNU/Linux 8
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-17969  

Original Bulletin: 
   http://www.debian.org/security/2018/dsa-4104

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Debian. It is recommended that administrators 
         running p7zip check for an updated version of the software for their
         operating system.

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Debian Security Advisory DSA-4104-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
February 04, 2018                     https://www.debian.org/security/faq
- - -------------------------------------------------------------------------

Package        : p7zip
CVE ID         : CVE-2017-17969
Debian Bug     : 888297

'landave' discovered a heap-based buffer overflow vulnerability in the
NCompress::NShrink::CDecoder::CodeReal method in p7zip, a 7zr file
archiver with high compression ratio. A remote attacker can take
advantage of this flaw to cause a denial-of-service or, potentially the
execution of arbitrary code with the privileges of the user running
p7zip, if a specially crafted shrinked ZIP archive is processed.

For the oldstable distribution (jessie), this problem has been fixed
in version 9.20.1~dfsg.1-4.1+deb8u3.

For the stable distribution (stretch), this problem has been fixed in
version 16.02+dfsg-3+deb9u1.

We recommend that you upgrade your p7zip packages.

For the detailed security status of p7zip please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/p7zip

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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