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Vulnerability Details : 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).
Publish Date : 2009-07-16 Last Update Date : 2018-11-08
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- CVSS Scores & Vulnerability Types

CVSS Score
7.2
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Bypass a restriction or similar
CWE ID 16

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat important
2.1
AV:L/AC:L/Au:N/C:N/I:P/A:N 2009-06-30 2009-06-26
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- Related OVAL Definitions

Title Definition Id Class Family
CVE-2009-1895 oval:org.opensuse.security:def:20091895 unix
DSA-1844 linux-2.6.24 -- denial of service/privilege escalation oval:org.mitre.oval:def:8024 unix
DSA-1844-1 linux-2.6.24 -- denial of service/privilege escalation oval:org.mitre.oval:def:13582 unix
DSA-1845 linux-2.6 -- denial of service, privilege escalation oval:org.mitre.oval:def:7036 unix
DSA-1845-1 linux-2.6 -- denial of service, privilege escalation oval:org.mitre.oval:def:13534 unix
ELSA-2009:1193: kernel security and bug fix update (Important) oval:org.mitre.oval:def:22751 unix
RHSA-2009:1193 -- kernel security and bug fix update (Important) oval:org.mitre.oval:def:29154 unix
RHSA-2009:1193: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20091193 unix
RHSA-2009:1438: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20091438 unix
RHSA-2009:1550: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20091550 unix
Service Console update for COS kernel oval:org.mitre.oval:def:11768 unix
The personality subsystem in the Linux kernel before 2.6.31-rc3 has a PER_CLEAR_ON_SETID setting that does not clear the... oval:org.mitre.oval:def:9453 unix
VMware kernel personality subsystem vulnerability oval:org.mitre.oval:def:7826 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2009-1895

# Product Type Vendor Product Version Update Edition Language
1 OS Canonical Ubuntu Linux 6.06 ~~lts~~~ Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 8.04 ~~lts~~~ Version Details Vulnerabilities
3 OS Canonical Ubuntu Linux 8.10 Version Details Vulnerabilities
4 OS Canonical Ubuntu Linux 9.04 Version Details Vulnerabilities
5 OS Debian Debian Linux 4.0 Version Details Vulnerabilities
6 OS Debian Debian Linux 5.0 Version Details Vulnerabilities
7 OS Linux Linux Kernel 2.6.31 Version Details Vulnerabilities
8 OS Linux Linux Kernel 2.6.31 RC1 Version Details Vulnerabilities
9 OS Linux Linux Kernel 2.6.31 RC2 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Canonical Ubuntu Linux 4
Debian Debian Linux 2
Linux Linux Kernel 3

- References For CVE-2009-1895

http://www.vupen.com/english/advisories/2009/1866
VUPEN ADV-2009-1866
http://blog.cr0.org/2009/06/bypassing-linux-null-pointer.html
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00223.html
FEDORA FEDORA-2009-8144
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00166.html
FEDORA FEDORA-2009-8264
https://bugs.launchpad.net/bugs/cve/2009-1895 CONFIRM
https://rhn.redhat.com/errata/RHSA-2009-1540.html
REDHAT RHSA-2009:1540
https://rhn.redhat.com/errata/RHSA-2009-1550.html
REDHAT RHSA-2009:1550
http://www.vupen.com/english/advisories/2009/3316
VUPEN ADV-2009-3316
http://www.ubuntu.com/usn/usn-807-1
UBUNTU USN-807-1
http://www.vmware.com/security/advisories/VMSA-2009-0016.html CONFIRM
http://www.securityfocus.com/archive/1/505254/100/0/threaded
BUGTRAQ 20090724 rPSA-2009-0111-1 kernel
http://www.securityfocus.com/archive/1/507985/100/0/threaded
BUGTRAQ 20091120 VMSA-2009-0016 VMware vCenter and ESX update release and vMA patch release address multiple security issue in third party components
http://www.securityfocus.com/bid/35647
BID 35647 Linux Kernel 'PER_CLEAR_ON_SETID' Incomplete Personality List Access Validation Weakness Release Date:2010-06-25
http://www.securityfocus.com/archive/1/512019/100/0/threaded
BUGTRAQ 20100625 VMSA-2010-0010 ESX 3.5 third party update for Service Console kernel
http://www.redhat.com/support/errata/RHSA-2009-1193.html
REDHAT RHSA-2009:1193
http://www.debian.org/security/2009/dsa-1845
DEBIAN DSA-1845
http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc3 CONFIRM
http://www.redhat.com/support/errata/RHSA-2009-1438.html
REDHAT RHSA-2009:1438
http://www.mandriva.com/security/advisories?name=MDVSA-2011:051
MANDRIVA MDVSA-2011:051
http://wiki.rpath.com/Advisories:rPSA-2009-0111 CONFIRM
http://www.debian.org/security/2009/dsa-1844
DEBIAN DSA-1844
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f9fabcb58a6d26d6efde842d1703ac7cfa9427b6 CONFIRM
http://patchwork.kernel.org/patch/32598/ CONFIRM

- Metasploit Modules Related To CVE-2009-1895

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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