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).

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-1844-1 New Linux 2.6.24 packages fix several vulnerabilities
Debian DSA Debian DSA DSA-1845-1 New Linux 2.6.26 packages fix several vulnerabilities
EUVD EUVD EUVD-2009-1890 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).
Ubuntu USN Ubuntu USN USN-807-1 Linux kernel vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

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

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Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2024-08-07T05:27:54.804Z

Reserved: 2009-06-02T00:00:00.000Z

Link: CVE-2009-1895

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2009-07-16T15:30:00.703

Modified: 2025-04-09T00:30:58.490

Link: CVE-2009-1895

cve-icon Redhat

Severity : Important

Publid Date: 2009-06-26T00:00:00Z

Links: CVE-2009-1895 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses