CVE-2009-1895

kernel: personality: fix PER_CLEAR_ON_SETID

Published Jul 16, 2009 CVSS 2.0 · 7.2 High EPSS < 1% KEV · Not listed
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).

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

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
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

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Aug 7, 2024, 5:27 AM
Reserved
Jun 2, 2009, 12:00 AM
Status
Modified
Published
Jul 16, 2009, 3:30 PM
Modified
Jun 16, 2026, 11:08 PM
Severity
Important
Public date
Jun 26, 2009, 12:00 AM