CVE-2009-1895

Linux kernel <2.6.31-rc3 - Memory Corruption

Title source: llm

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).

References (35)

[Patch, Third Party Advisory] http://blog.cr0.org/2009/06/bypassing-linux-null-pointer.html

[Patch] http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f9fabcb58a6d26d6efde842d1703ac7cfa9427b6

[Patch, Vendor Advisory] http://patchwork.kernel.org/patch/32598/

[Third Party Advisory] http://secunia.com/advisories/35801

[Third Party Advisory] http://secunia.com/advisories/36045

[Third Party Advisory] http://secunia.com/advisories/36051

[Third Party Advisory] http://secunia.com/advisories/36054

[Third Party Advisory] http://secunia.com/advisories/36116

[Third Party Advisory] http://secunia.com/advisories/36131

[Third Party Advisory] http://secunia.com/advisories/36759

[Third Party Advisory] http://secunia.com/advisories/37471

[Third Party Advisory] http://wiki.rpath.com/Advisories:rPSA-2009-0111

[Third Party Advisory] http://www.debian.org/security/2009/dsa-1844

[Third Party Advisory] http://www.debian.org/security/2009/dsa-1845

[Vendor Advisory] http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc3

[Third Party Advisory] http://www.mandriva.com/security/advisories?name=MDVSA-2011:051

[Broken Link] http://www.osvdb.org/55807

[Third Party Advisory] http://www.redhat.com/support/errata/RHSA-2009-1193.html

[Third Party Advisory] http://www.redhat.com/support/errata/RHSA-2009-1438.html

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/archive/1/505254/100/0/threaded

... and 15 more

Scores

EPSS 0.0006

EPSS Percentile 18.5%

Classification

CWE

CWE-16

Status draft

Affected Products (9)

linux/linux_kernel < 2.6.31

linux/linux_kernel

linux/linux_kernel

debian/debian_linux

debian/debian_linux

canonical/ubuntu_linux

canonical/ubuntu_linux

canonical/ubuntu_linux

canonical/ubuntu_linux

Timeline

Published Jul 16, 2009

Tracked Since Feb 18, 2026