CVE-2009-2695

HIGH

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.

References

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/oval%3Aorg.mitre.oval%3Adef%3A7144

https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9882

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

Details

Source: MITRE

Published: 2009-08-28

Updated: 2017-09-19

Type: CWE-119

Risk Information

CVSS v2.0

Base Score: 7.2

Vector: (AV:L/AC:L/Au:N/C:C/I:C/A:C)

Impact Score: 10

Exploitability Score: 3.9

Severity: HIGH