From mboxrd@z Thu Jan 1 00:00:00 1970 From: jbernard@debian.org (Jon Bernard) Date: Wed, 29 Sep 2010 09:27:56 -0400 Subject: [ltt-dev] [geissert@debian.org: Bug#598309: ust-bin: CVE-2010-3386: insecure library loading] Message-ID: <20100929132755.GA20790@starquasia> I just received this bug report and wanted to forward it here to get any thoughts and/or opinions. -- Jon ----- Forwarded message from Raphael Geissert ----- Date: Tue, 28 Sep 2010 04:23:22 +0000 From: Raphael Geissert To: submit at bugs.debian.org Subject: Bug#598309: ust-bin: CVE-2010-3386: insecure library loading Reply-To: Raphael Geissert , 598309 at bugs.debian.org Package: ust-bin Version: 0.7-1 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/usttrace line 136: export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${LIBUST_PATH%libust.so}" /usr/bin/usttrace line 144: export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${LIBUST_PATH%libust.so}" 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-2010-3386. 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-2010-3386 [1] http://security-tracker.debian.org/tracker/CVE-2010-3386 Sincerely, Raphael Geissert ----- End forwarded message -----