Attacker Value
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Exploitability
Unknown
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User Interaction
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Privileges Required
Unknown
Attack Vector
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0

CVE-2009-1895

Disclosure Date: July 16, 2009
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Description

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).

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CVSS V3 Severity and Metrics
Base Score:
None
Impact Score:
Unknown
Exploitability Score:
Unknown
Vector:
Unknown
Attack Vector (AV):
Unknown
Attack Complexity (AC):
Unknown
Privileges Required (PR):
Unknown
User Interaction (UI):
Unknown
Scope (S):
Unknown
Confidentiality (C):
Unknown
Integrity (I):
Unknown
Availability (A):
Unknown

General Information

Vendors

  • canonical,
  • debian,
  • linux

Products

  • debian linux 4.0,
  • debian linux 5.0,
  • linux kernel,
  • linux kernel 2.6.31,
  • ubuntu linux 6.06,
  • ubuntu linux 8.04,
  • ubuntu linux 8.10,
  • ubuntu linux 9.04

References

Advisory

Additional Info

Technical Analysis