CVE-2009-2695
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.51%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 2.0
- 7.2 HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C
- EPSS
- 0.51% probability · 42th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- linux/linux kernel
- Source
- cve@mitre.org
References
- http://danwalsh.livejournal.com/30084.htmlExploit
- http://eparis.livejournal.com/606.html
- http://git.kernel.org/?p=linux/kernel/git/jmorris/security-testing-2.6.git%3Ba=commit%3Bh=47d439e9fb8a81a90022cfa785bf1c36c4e2aff6
- http://git.kernel.org/?p=linux/kernel/git/jmorris/security-testing-2.6.git%3Ba=commit%3Bh=7c73875e7dda627040b12c19b01db634fa7f0fd1
- http://git.kernel.org/?p=linux/kernel/git/jmorris/security-testing-2.6.git%3Ba=commit%3Bh=84336d1a77ccd2c06a730ddd38e695c2324a7386
- http://git.kernel.org/?p=linux/kernel/git/jmorris/security-testing-2.6.git%3Ba=commit%3Bh=a2551df7ec568d87793d2eea4ca744e86318f205
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=1d9959734a1949ea4f2427bd2d8b21ede6b2441c
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=788084aba2ab7348257597496befcbccabdc98a3
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8cf948e744e0218af604c32edecde10006dc8e9e
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=9c0d90103c7e0eb6e638e5b649e9f6d8d9c1b4b3
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=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/Patch
- http://patchwork.kernel.org/patch/36650/
- http://secunia.com/advisories/36501Vendor Advisory
- 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/36051Patch
- http://www.ubuntu.com/usn/USN-852-1
- http://www.vupen.com/english/advisories/2010/0528
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.