OSVDB ID: 11759 Title: XFree86 XDM gettimeofday() Predictable Cookie Weakness |
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Description |
XDM in XFree86 contains a flaw that may allow a malicious user to perform a brute force attack. The issue is triggered when X server is complied without HasXdmXauth, which will cause the cookies to be generated by the "gettimeofday" function. A remote attacker can potentially guess the cookie values and gain unauthorized access to the system, resulting in a loss of integrity. |
Classification |
Location:
Remote/Network Access Required
Attack Type: Misconfiguration Impact: Loss of Integrity Exploit: Exploit Unknown Disclosure: OSVDB Verified |
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(s): 1. use good compilation options ; 2. limit access to X11 sockets (start X server with "-nolisten tcp"...) |
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Credit |
Unknown or Incomplete |