The runtime linker in QNX Neutrino RTOS 6.5.0 does not properly clear the LD_DEBUG_OUTPUT and LD_DEBUG environment variables when a program is spawned from a setuid program, which allows local users to overwrite files via a symlink attack.
CVSS Severity (version 2.0):
Impact Subscore: 4.9
Exploitability Subscore: 3.4
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized modification; Allows disruption of service
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20110629 Breaking the links: Exploiting the linker
20110311 Medium severity flaw in QNX Neutrino RTOS
Vulnerable software and versions