55807 : Linux Kernel PER_CLEAR_ON_SETID Mask Local Security Restriction Bypass
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Timeline

Disclosure Date
2009-07-13

Description

<em style='font-weight:bold;'>(Description Provided by <a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=2009-1895" target="_blank">CVE</a>)</em> : The personality subsystem in the Linux kernel before 2.6.31-rc3 has a PER_CLEAR_ON_SETID setting that does not clear the ADDR_COMPAT_LAYOUT and MMAP_PAGE_ZERO flags when executing a setuid or setgid program, which makes it easier for local users to leverage the details of memory usage to (1) conduct NULL pointer dereference attacks, (2) bypass the mmap_min_addr protection mechanism, or (3) defeat address space layout randomization (ASLR).

Classification

Location: Local Access Required
Attack Type: Input Manipulation
Impact: Loss of Integrity
Solution: Patch / RCS
Disclosure: Vendor Verified

Products

Unknown or Incomplete

References

Credit

Unknown or Incomplete

CVSSv2 Score

CVSSv2 Base Score = 7.2
Source: nvd.nist.gov | Generated: 2009-07-16 | Disagree?

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