CVE-2009-1895

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).

Affected Software

Name	Vendor	Start Version	End Version
Linux_kernel	Linux	*	2.6.31 (including)
Linux_kernel	Linux	2.6.31-rc1 (including)	2.6.31-rc1 (including)
Linux_kernel	Linux	2.6.31-rc2 (including)	2.6.31-rc2 (including)
MRG for RHEL-5	RedHat	kernel-rt-0:2.6.24.7-137.el5rt	*
Red Hat Enterprise Linux 3	RedHat	kernel-0:2.4.21-63.EL	*
Red Hat Enterprise Linux 4	RedHat	kernel-0:2.6.9-89.0.11.EL	*
Red Hat Enterprise Linux 5	RedHat	kernel-0:2.6.18-128.4.1.el5	*
Red Hat Enterprise Linux 5.2 Z Stream	RedHat	kernel-0:2.6.18-92.1.35.el5	*
Red Hat Enterprise Linux 5.3.Z - Server Only	RedHat	kernel-0:2.6.18-128.4.1.el5	*
Linux	Ubuntu	hardy	*
Linux	Ubuntu	intrepid	*
Linux	Ubuntu	jaunty	*
Linux	Ubuntu	upstream	*
Linux-source-2.6.15	Ubuntu	upstream	*

NVD	https://nvd.nist.gov/vuln/detail/CVE-2009-1895
CWE	https://cwe.mitre.org/data/definitions/16.html

Affected Software

References