[ubuntu-mono] [Bug 651054] Re: CVE-2010-3365: insecure library loading

Jamie Strandboge jamie at ubuntu.com
Mon Oct 4 21:01:55 BST 2010


Uploaded to security PPA. Will publish after they finish building.
Thanks for the patch!

** Changed in: mistelix (Ubuntu Lucid)
       Status: Triaged => Fix Committed

** Changed in: mistelix (Ubuntu Karmic)
       Status: Triaged => Fix Committed

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CVE-2010-3365: insecure library loading
https://bugs.launchpad.net/bugs/651054
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Status in “mistelix” package in Ubuntu: Fix Released
Status in “mistelix” source package in Lucid: Fix Committed
Status in “mistelix” source package in Karmic: Fix Committed

Bug description:
Binary package hint: mistelix

>From http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=598297:


Package: mistelix
Version: 0.31-1
Severity: grave
Tags: security
User: team at security.debian.org
Usertags: ldpath

Hello,

During a review of the Debian archive, I've found your package to
contain a script that can be abused by an attacker to execute arbitrary
code.

The vulnerability is introduced by an insecure change to
LD_LIBRARY_PATH, and environment variable used by ld.so(8) to look for
libraries on a directory other than the standard paths.

Vulnerable code follows:

/usr/bin/mistelix line 8:
export LD_LIBRARY_PATH=$libdir/mistelix/:$LD_LIBRARY_PATH

When there's an empty item on the colon-separated list of
LD_LIBRARY_PATH, ld.so treats it as '.' (i.e. CWD/$PWD.)
If the given script is executed from a directory where a potential,
local, attacker can write files to, there's a chance to exploit this
bug.

This vulnerability has been assigned the CVE id CVE-2010-3365. Please make sure
you mention it when forwarding this report to upstream and when fixing
this bug (everywhere: upstream and here at Debian.)

[0] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-3365
[1] http://security-tracker.debian.org/tracker/CVE-2010-3365

Sincerely,
Raphael Geissert





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