CVE-2009-1895

CVE Details

Release Date:	2009-07-16
Impact:	Important	What is this?

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).

See more information about CVE-2009-1895 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v2 metrics

Base Score:	7.2
Vector String:	AV:L/AC:L/Au:N/C:C/I:C/A:C
Version:	2.0
Attack Vector:	Local
Attack Complexity:	Low
Authentication:	None
Confidentiality Impact:	Complete
Integrity Impact:	Complete
Availability Impact:	Complete

Errata information

Platform	Errata	Release Date
Oracle Enterprise Linux version 4 (kernel)	ELSA-2009-1438	2009-09-15
Oracle Enterprise Linux version 4 (ocfs2-2.6.9-89.0.11.0.1.EL)	ELSA-2009-1438	2009-09-15
Oracle Enterprise Linux version 4 (oracleasm-2.6.9-89.0.11.0.1.EL)	ELSA-2009-1438	2009-09-15
Oracle Linux version 5 (kernel)	ELSA-2009-1193	2009-08-04
Oracle Linux version 5 (ocfs2-2.6.18-128.4.1.0.1.el5)	ELSA-2009-1193	2009-08-04
Oracle Linux version 5 (oracleasm-2.6.18-128.4.1.0.1.el5)	ELSA-2009-1193	2009-08-04