CVE-2009-2695 Information

Description

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.

Reference

http://danwalsh.livejournal.com/30084.html http://eparis.livejournal.com/606.html http://git.kernel.org/?p=linux/kernel/git/jmorris/security-testing-2.6.git;a=commit;h=47d439e9fb8a81a90022cfa785bf1c36c4e2aff6 http://git.kernel.org/?p=linux/kernel/git/jmorris/security-testing-2.6.git;a=commit;h=7c73875e7dda627040b12c19b01db634fa7f0fd1 http://git.kernel.org/?p=linux/kernel/git/jmorris/security-testing-2.6.git;a=commit;h=84336d1a77ccd2c06a730ddd38e695c2324a7386 http://git.kernel.org/?p=linux/kernel/git/jmorris/security-testing-2.6.git;a=commit;h=a2551df7ec568d87793d2eea4ca744e86318f205 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=1d9959734a1949ea4f2427bd2d8b21ede6b2441c http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=788084aba2ab7348257597496befcbccabdc98a3 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8cf948e744e0218af604c32edecde10006dc8e9e http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=9c0d90103c7e0eb6e638e5b649e9f6d8d9c1b4b3 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ab5a91a8364c3d6fc617abc47cc81d162c01d90a http://kbase.redhat.com/faq/docs/DOC-18042 http://lists.vmware.com/pipermail/security-announce/2010/000082.html http://patchwork.kernel.org/patch/36539/ http://patchwork.kernel.org/patch/36540/ http://patchwork.kernel.org/patch/36649/ http://patchwork.kernel.org/patch/36650/ http://secunia.com/advisories/36501 http://secunia.com/advisories/37105 http://secunia.com/advisories/38794 http://secunia.com/advisories/38834 http://thread.gmane.org/gmane.linux.kernel.lsm/9075 http://twitter.com/spendergrsec/statuses/3303390960 http://www.debian.org/security/2010/dsa-2005 http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc7 http://www.openwall.com/lists/oss-security/2009/08/17/4 http://www.redhat.com/support/errata/RHSA-2009-1672.html http://www.securityfocus.com/bid/36051 http://www.ubuntu.com/usn/USN-852-1 http://www.vupen.com/english/advisories/2010/0528 https://bugzilla.redhat.com/show_bug.cgi?id=511143 https://bugzilla.redhat.com/show_bug.cgi?id=517830 https://oval.cisecurity.org/repository/search/definition/oval3Aorg.mitre.oval3Adef3A7144 https://oval.cisecurity.org/repository/search/definition/oval3Aorg.mitre.oval3Adef3A9882 https://rhn.redhat.com/errata/RHSA-2009-1540.html https://rhn.redhat.com/errata/RHSA-2009-1548.html https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01256.html