Bug 24331

Summary:	CVE-2010-3382: insecure library loading
Product:	Sisyphus	Reporter:	Vladimir Lettiev <crux>
Component:	tau	Assignee:	Evgeny Sinelnikov <sin>
Status:	CLOSED FIXED	QA Contact:	qa-sisyphus
Severity:	blocker
Priority:	P3	CC:	antohami, cas, cow, darktemplar, enp, evg, george, glebfm, hiddenman, imz, lav, ldv, mithraen, nbr, qa_viy, real, rider, sem, shaba, sin, solo, vitty, viy, vvk
Version:	unstable	Keywords:	security
Hardware:	all
OS:	Linux
URL:	http://bugs.debian.org/598303

Description Vladimir Lettiev 2010-10-16 12:37:28 MSD

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/tauex line 197:
export LD_LIBRARY_PATH=$TAUROOT/$TAUARCH/lib/$theBinding:$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.

Comment 1 Repository Robot 2010-10-18 14:23:15 MSD

tau-2.19.2-alt6 -> sisyphus:

* Mon Oct 18 2010 Eugeny A. Rostovtsev (REAL) <real at altlinux> 2.19.2-alt6
- Fixed insecure setting of LD_LIBRARY_PATH (ALT #24331)

Comment 2 Vladimir Lettiev 2010-10-20 09:16:34 MSD

Более педантичный подход к проверке на пустую строку ` if [ -n "$VAR" ]; `