TITLE:
QNX Neutrino RTOS Multiple Privilege Escalation Vulnerabilities

SECUNIA ADVISORY ID:
SA18750

VERIFY ADVISORY:
http://secunia.com/advisories/18750/

CRITICAL:
Less critical

IMPACT:
Privilege escalation, DoS

WHERE:
Local system

OPERATING SYSTEM:
QNX Neutrino RTOS 6.x
http://secunia.com/product/708/

DESCRIPTION:
Multiple vulnerabilities have been reported in QNX Neutrino RTOS,
which can be exploited by malicious, local users to cause a DoS
(Denial of Service) or gain escalated privileges.

1) The crttrap utility loads libraries insecurely, which can be
exploited to load an arbitrary library containing malicious code by
manipulating the LD_LIBRARY_PATH environment variable.

Successful exploitation allows execution of arbitrary code with root
privileges (installed setuid "root" by default), but requires that
the system is in text mode.

The vulnerability has been reported in version 6.2.1. Other versions
may also be affected.

2) A format string error in the fontsleuth utility can be exploited
to execute arbitrary code with root privileges (installed setuid
"root" by default) by supplying a specially crafted string as the
zeroth argument.

The vulnerability has been reported in version 6.3.0. Other versions
may also be affected.

3) A boundary error in the libAp system library in the
"_ApFindTranslationFile()" function when handling the ABLPATH
environment variable can be exploited to cause a stack-based buffer
overflow and execute arbitrary code with root privileges (used by
various utilities installed setuid "root" by default).

A similar vulnerability is also present in the handling of the ABLANG
environment variable.

The vulnerabilities have been reported in version 6.3.0. Other
versions may also be affected.

4) A boundary error in the libph system library in the "setitem()"
function when handling the PHOTON_PATH environment variable can be
exploited to cause a stack-based buffer overflow and execute
arbitrary code with root privileges (used by various utilities
installed setuid "root" by default).

The vulnerabilities have been reported in version 6.3.0. Other
versions may also be affected.

5) A race condition in the phfont utility (installed setuid "root" by
default) when spawning phfontphf can be exploited to gain root
privileges by manipulating the PHFONT and PHOTON2_PATH environment
variables.

The vulnerability has been reported in version 6.2.1. Other versions
may also be affected.

6) A boundary error in the su utility can be exploited to cause a
stack-based buffer overflow by passing an overly long string as the
first command line argument.

Successful exploitation allows execution of arbitrary code with
"root" privileges (installed setuid "root" by default).

The vulnerability has been reported in version 6.2.0. Other versions
may also be affected.

7) An error can be exploited to cause the system to become
unresponsive and hang by executing the following command:

echo -e "break *0xb032d59fnrncontncont" | gdb gdb

The vulnerability has been reported in version 6.3.0. The
vulnerability does not affect version 6.0. Other versions may also be
affected.

8) Insecure file permissions on the "/etc/rc.d/rc.local" file can be
exploited to gain "root" privileges by adding arbitrary commands to
the file.

The security issue has been reported in version 6.3.0. Version 6.0 is
unaffected. Other versions may also be vulnerable.

9) A boundary error in the passwd utility can be exploited to cause a
buffer overflow by passing an overly long string as the first command
line argument.

Successful exploitation allows execution of arbitrary code with
"root" privileges (installed setuid "root" by default).

The vulnerability has been reported in version 6.2.0. Other versions
may also be affected.

SOLUTION:
Grant only trusted users access to affected systems.

Remove setuid bits from affected files. Set proper file permissions
on the rc.local file, and allow only trusted users to run GDB.

PROVIDED AND/OR DISCOVERED BY:
1) Discovered by anonymous person and reported via iDEFENSE.
2) iDefense Labs
3) Filipe Balestra
4) Filipe Balestra
5) Knud Højgaard
6) Texonet
7) Discovered by anonymous person and reported via iDEFENSE.
8) Discovered by anonymous person and reported via iDEFENSE.
9) Texonet

ORIGINAL ADVISORY:
iDEFENSE:
1)
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=379
2)
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=380
3)
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=381
4)
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=382
5)
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=383
6)
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=385
7)
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=386
8)
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=387
9)
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=388

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