CVE-2009-1895

Description

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).

Category

7.2
CVSS
Severity: High
CVSS 2.0 •
EPSS 0.06%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory mandriva.com Vendor Advisory redhat.com Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/archive/1/512019/100/0/threaded mailing list vdb entry third party advisory
http://wiki.rpath.com/Advisories:rPSA-2009-0111 third party advisory
http://secunia.com/advisories/36131 third party advisory
http://www.osvdb.org/55807 vdb entry broken link
http://www.vupen.com/english/advisories/2009/1866 vdb entry third party advisory patch
https://rhn.redhat.com/errata/RHSA-2009-1540.html third party advisory vendor advisory
http://secunia.com/advisories/37471 third party advisory
http://secunia.com/advisories/36759 third party advisory
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00223.html third party advisory vendor advisory
http://www.debian.org/security/2009/dsa-1844 third party advisory vendor advisory
http://www.ubuntu.com/usn/usn-807-1 third party advisory vendor advisory
http://www.vmware.com/security/advisories/VMSA-2009-0016.html third party advisory
http://www.redhat.com/support/errata/RHSA-2009-1193.html third party advisory vendor advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f9fabcb58a6d26d6efde842d1703ac7cfa9427b6
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7826 vdb entry third party advisory signature
http://www.securityfocus.com/bid/35647 vdb entry third party advisory
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00166.html third party advisory vendor advisory
http://www.securityfocus.com/archive/1/505254/100/0/threaded mailing list vdb entry third party advisory
http://blog.cr0.org/2009/06/bypassing-linux-null-pointer.html third party advisory patch
http://www.mandriva.com/security/advisories?name=MDVSA-2011:051 third party advisory vendor advisory
http://www.securityfocus.com/archive/1/507985/100/0/threaded mailing list vdb entry third party advisory
http://secunia.com/advisories/36051 third party advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11768 vdb entry third party advisory signature
http://secunia.com/advisories/36045 third party advisory
http://secunia.com/advisories/36116 third party advisory
https://rhn.redhat.com/errata/RHSA-2009-1550.html third party advisory vendor advisory
http://patchwork.kernel.org/patch/32598/ patch vendor advisory
http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc3 vendor advisory
http://secunia.com/advisories/35801 third party advisory
http://secunia.com/advisories/36054 third party advisory
https://bugs.launchpad.net/bugs/cve/2009-1895 third party advisory
http://www.debian.org/security/2009/dsa-1845 third party advisory vendor advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9453 vdb entry third party advisory signature
http://www.redhat.com/support/errata/RHSA-2009-1438.html third party advisory vendor advisory
http://www.vupen.com/english/advisories/2009/3316 vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2009-1895?
CVE-2009-1895 has been scored as a high severity vulnerability.
How to fix CVE-2009-1895?
To fix CVE-2009-1895, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2009-1895 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2009-1895 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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