22964 : QNX Neutrino RTOS libph Library PHOTON_PATH Environment Variable Local Overflow
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
3	127	over 4 years ago	10 days ago	2 times	95%

Timeline

Discovery Date	Vendor Informed Date	Disclosure Date
2005-12-15	2005-12-15	2006-02-07

Description

QNX Neutrino RTOS contains a flaw that may allow a local attacker to elevate their privileges. The issue is due to the improper handling of environment variables in the libph library (used by many applications in the Photon API package). The libph system library (libph.so.3) does not check the bounds on user-supplied input to the PHOTON_PATH variable allowing a user to overflow the setitem() function, which will execute arbitrary code under the privilege of the utility calling the library. Since many of the applications linked against libph.so.3 are SUID, there are many vectors for using this to leverage privileged access.

Classification

Location: Local Access Required
Attack Type: Input Manipulation
Impact: Loss of Integrity
Exploit: Exploit Rumored

Solution

Currently, there are no known upgrades or patches to correct this issue. It is possible to correct the flaw by implementing the following workaround: remove the setuid bit from any programs linked to libph.so.3

Products

QNX Software Systems

QNX Neutrino RTOS

6.3.0

References

Security Tracker: 1015599
Secunia Advisory ID: 18750
CVE ID: 2006-0619 (see also: NVD)
ISS X-Force ID: 24557
VUPEN Advisory: ADV-2006-0474
Mail List Post: http://archives.neohapsis.com/archives/fulldisclosure/2006-02/0117.html
Other Advisory URL: http://www.idefense.com/intelligence/vulnerabilities/display.php?id=382
Vendor URL: http://www.qnx.com/products/rtos/

Credit

Filipe Balestra - iDefense Labs VCP

CVSSv2 Score

CVSSv2 Base Score = 4.6
Source: nvd.nist.gov | Generated: 2006-03-21 | Disagree?

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