CVE-2009-1895: Null Pointer Dereference
First published: Thu Jul 16 2009(Updated: )
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).
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <=2.6.31 | |
| Linux Linux kernel | =2.6.31-rc1 | |
| Linux Linux kernel | =2.6.31-rc2 | |
| Debian Debian Linux | =5.0 | |
| Debian Debian Linux | =4.0 | |
| Canonical Ubuntu Linux | =6.06 | |
| Canonical Ubuntu Linux | =9.04 | |
| Canonical Ubuntu Linux | =8.04 | |
| Canonical Ubuntu Linux | =8.10 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- http://blog.cr0.org/2009/06/bypassing-linux-null-pointer.html
- http://www.securityfocus.com/archive/1/505254/100/0/threaded
- http://www.securityfocus.com/archive/1/507985/100/0/threaded
- http://www.securityfocus.com/archive/1/512019/100/0/threaded
- http://www.securityfocus.com/bid/35647
- http://secunia.com/advisories/35801
- http://secunia.com/advisories/36045
- http://secunia.com/advisories/36051
- http://secunia.com/advisories/36054
- http://secunia.com/advisories/36116
- http://secunia.com/advisories/36131
- http://secunia.com/advisories/36759
- http://secunia.com/advisories/37471
- http://www.osvdb.org/55807
- http://www.vupen.com/english/advisories/2009/1866
- http://www.vupen.com/english/advisories/2009/3316
- http://www.debian.org/security/2009/dsa-1844
- http://www.debian.org/security/2009/dsa-1845
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00223.html
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00166.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:051
- http://www.redhat.com/support/errata/RHSA-2009-1193.html
- http://www.redhat.com/support/errata/RHSA-2009-1438.html
- https://rhn.redhat.com/errata/RHSA-2009-1540.html
- https://rhn.redhat.com/errata/RHSA-2009-1550.html
- http://www.ubuntu.com/usn/usn-807-1
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f9fabcb58a6d26d6efde842d1703ac7cfa9427b6
- http://patchwork.kernel.org/patch/32598/
- http://wiki.rpath.com/Advisories:rPSA-2009-0111
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc3
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html
- https://bugs.launchpad.net/bugs/cve/2009-1895
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11768
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7826
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9453
- collector/nvd-historical
- collector/nvd-index
- agent/author
- agent/description
- agent/event
- agent/first-publish-date
- agent/last-modified-date
- agent/references
- agent/remedy
- agent/severity
- agent/softwarecombine
- agent/tags
- agent/type
- agent/weakness
- collector/launchpad-cve
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/2.6.31
- version/linux linux kernel/2.6.31-rc1
- version/linux linux kernel/2.6.31-rc2
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/5.0
- version/debian debian linux/4.0
- vendor/canonical
- canonical/canonical ubuntu linux
- version/canonical ubuntu linux/6.06
- version/canonical ubuntu linux/9.04
- version/canonical ubuntu linux/8.04
- version/canonical ubuntu linux/8.10