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Code Execution Vulnerabilities In 7zip

2016-05-17 22:50
Just karma whoring here, since I noticed the announcement and figured
the news needs to spread. Cisco Talis discovered a number of bugs in
7zip versions prior to 16.00, some of which lead to arbitrary code
execution when processing certain malformed archives:

http://www.zdnet.com/article/severe-7-zip-vulnerabilities-cause-top-security-software-tools-patch-panic/#ftag=RSSbaffb68
http://blog.talosintel.com/2016/05/multiple-7-zip-vulnerabilities.html

Versions from 9.20 to 15.00 are said to contain some or all of the bugs.

The comment stream in the 2nd link contains this remark:

"By default 7zip will pass inputs through all of its decompression
routines so blocking certain extensions will not work unless you also
pass a command line argument that specifies the parser to use. These
bugs will trigger with a malformed UDF/HFS file with a .zip extension
unless the added command line argument is used."

Upgrading to 7zip V16.00 ("as soon as possible") is said to fix the
vulnerabilities.

The official 7zip changelog at http://www.7-zip.org/history.txt for
16.00 just says "Some bugs were fixed".

Nick
--
Cloud so convenient
Service provider not bright
All the files are gone

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Source: 94/yaM/6102/erusolcsidlluf/gro.stsilces

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