#82 CVE-2010-3351: insecure library loading

[quadrispro]

The original report is available at:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=598285
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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/startBristol line 350:
export LD_LIBRARY_PATH=/usr/local/lib:usr/lib:${LD_LIBRARY_PATH}:${BRISTOL}/lib

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.

Note that there's also a missing slash on the second entry (_usr_/lib.)

This vulnerability has been assigned the CVE id CVE-2010-3351. 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-2010-3351
[1] http://security-tracker.debian.org/tracker/CVE-2010-3351

[Nick Copeland]

This is pretty easy to resolve, I will work on getting you a fixed script before the end of the week.

[Nick Copeland]

0.60 fixe for LD_LIBRARY_PATH security concerns

[Nick Copeland]

The attached file should resolve the potential security issues of the LD_LIBRARY_PATH as used in the script.

[quadrispro]

Applied, thanks!

[Nick Copeland]

Fix will be in next upload, current release can be patched with the attached file.