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Linux Kernel with SELinux 'mmap_min_addr' Low Memory NULL Pointer Dereference Vulnerability

oval:org.mitre.oval:def:7144

The Linux kernel before 2.6.31-rc7 does not properly prevent mmap operations that target page zero and other low memory addresses which allows local users to gain privileges by exploiting NULL pointer dereference vulnerabilities related to (1) the default configuration of the allow_unconfined_mmap_low boolean in SELinux on Red Hat Enterprise Linux (RHEL) 5 (2) an error that causes allow_unconfined_mmap_low to be ignored in the unconfined_t domain (3) lack of a requirement for the CAP_SYS_RAWIO capability for these mmap operations and (4) interaction between the mmap_min_addr protection mechanism and certain application programs.

Family:
unix
Status:
ACCEPTED
Platform(s):
  • VMWare ESX Server 4.0
Class:
vulnerability
Reference(s):
  • CVE-2009-2695
Product(s):