OSVDB ID: 11922 Title: XFree86 libX11.so LD_PRELOAD Privilege Escalation |
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Description |
A local overflow exists in XFree86. The libX11.so library fails to do a secure checking with the LD_PRELOAD environment variable while running a SUID executable. As a result an attacker can use his own library to poison a program using dynamically loadable libraries. By setting LD_PRELOAD, an attacker can execute arbitrary code and gain priviledges resulting in a loss of integrity. |
Classification |
Location:
Local Access Required
Attack Type: Input Manipulation Impact: Loss of Integrity Exploit: Exploit Rumored Disclosure: OSVDB Verified |
Solution |
Upgrade to version 4.2.1 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds. |
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Credit |
Unknown or Incomplete |