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CVE-2009-1895

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).


Affected Software


CPE Name Name Version
linux:linux_kernel linux linux kernel 2.6.31
debian:debian_linux debian debian linux 5.0
debian:debian_linux debian debian linux 4.0
canonical:ubuntu_linux canonical ubuntu linux 6.06
canonical:ubuntu_linux canonical ubuntu linux 9.04
canonical:ubuntu_linux canonical ubuntu linux 8.04
canonical:ubuntu_linux canonical ubuntu linux 8.10

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