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Vulnerability Details : CVE-2009-3621

net/unix/af_unix.c in the Linux kernel 2.6.31.4 and earlier allows local users to cause a denial of service (system hang) by creating an abstract-namespace AF_UNIX listening socket, performing a shutdown operation on this socket, and then performing a series of connect operations to this socket.
Publish Date : 2009-10-22 Last Update Date : 2020-08-12
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- CVSS Scores & Vulnerability Types

CVSS Score
4.9
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
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) Denial Of Service
CWE ID 400

- Vendor Statements

Red Hat is aware of this issue and is tracking it via the following bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=CVE-2009-3621 This issue has been rated as having moderate security impact. It was addressed in Red Hat Enterprise Linux 4, 5 and Red Hat Enterprise MRG via: https://rhn.redhat.com/errata/RHSA-2009-1671.html , https://rhn.redhat.com/errata/RHSA-2009-1670.html and https://rhn.redhat.com/errata/RHSA-2009-1540.html respectively. This issue is not planned to be fixed in Red Hat Enterprise Linux 3, due to this product being in Production 3 of its maintenance life-cycle, where only qualified security errata of important or critical impact are addressed. For further information about Errata Support Policy, visit: http://www.redhat.com/security/updates/errata/
Source: Redhat

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat moderate
4.9
AV:L/AC:L/Au:N/C:N/I:N/A:C 2009-10-19 2009-10-19
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- Related OVAL Definitions

Title Definition Id Class Family
CVE-2009-3621 oval:org.opensuse.security:def:20093621 unix
DSA-1927-1 linux-2.6 -- privilege escalation/denial of service/sensitive memory leak oval:org.mitre.oval:def:13428 unix
DSA-1928 linux-2.6.24 -- privilege escalation/denial of service/sensitive memory leak oval:org.mitre.oval:def:7937 unix
DSA-1928-1 linux-2.6.24 -- privilege escalation/denial of service/sensitive memory leak oval:org.mitre.oval:def:13351 unix
DSA-1929-1 linux-2.6 -- privilege escalation/denial of service/sensitive memory leak oval:org.mitre.oval:def:13735 unix
ELSA-2009:1670: kernel security and bug fix update (Important) oval:org.mitre.oval:def:23021 unix
Linux Kernel 'unix_stream_connect()' Local Denial of Service Vulnerability oval:org.mitre.oval:def:6895 unix
net/unix/af_unix.c in the Linux kernel 2.6.31.4 and earlier allows local users to cause a denial of service (system hang... oval:org.mitre.oval:def:9921 unix
RHSA-2009:1670 -- kernel security and bug fix update (Important) oval:org.mitre.oval:def:28862 unix
RHSA-2009:1670: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20091670 unix
RHSA-2009:1671: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20091671 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-2009-3621

# Product Type Vendor Product Version Update Edition Language
1 OS Canonical Ubuntu Linux 6.06 * * * Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 8.04 * * * 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 Canonical Ubuntu Linux 9.10 * * * Version Details Vulnerabilities
6 OS Fedoraproject Fedora 10 * * * Version Details Vulnerabilities
7 OS Linux Linux Kernel * * * * Version Details Vulnerabilities
8 OS Opensuse Opensuse 11.0 * * * Version Details Vulnerabilities
9 OS Opensuse Opensuse 11.2 * * * Version Details Vulnerabilities
10 OS Suse Suse Linux Enterprise Desktop 10 SP2 * * Version Details Vulnerabilities
11 OS Suse Suse Linux Enterprise Desktop 10 SP3 * * Version Details Vulnerabilities
12 OS Suse Suse Linux Enterprise Server 10 SP3 * * Version Details Vulnerabilities
13 OS Suse Suse Linux Enterprise Server 10 SP2 * * Version Details Vulnerabilities
14 OS Vmware ESX 4.0 * * * Version Details Vulnerabilities
15 Application Vmware VMA 4.0 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Canonical Ubuntu Linux 5
Fedoraproject Fedora 1
Linux Linux Kernel 1
Opensuse Opensuse 2
Suse Suse Linux Enterprise Desktop 2
Suse Suse Linux Enterprise Server 2
Vmware ESX 1
Vmware VMA 1

- References For CVE-2009-3621

http://www.ubuntu.com/usn/usn-864-1
UBUNTU USN-864-1
http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00005.html
SUSE SUSE-SA:2010:012
http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.html
SUSE SUSE-SA:2010:001
http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00007.html
SUSE SUSE-SA:2010:013
http://secunia.com/advisories/38017
SECUNIA 38017
http://secunia.com/advisories/37909
SECUNIA 37909
http://lists.opensuse.org/opensuse-security-announce/2009-12/msg00005.html
SUSE SUSE-SA:2009:064
http://www.redhat.com/support/errata/RHSA-2009-1670.html
REDHAT RHSA-2009:1670
http://www.mandriva.com/security/advisories?name=MDVSA-2009:329
MANDRIVA MDVSA-2009:329
https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00190.html
FEDORA FEDORA-2009-11038
http://lists.opensuse.org/opensuse-security-announce/2009-12/msg00002.html
SUSE SUSE-SA:2009:061
http://www.redhat.com/support/errata/RHSA-2009-1671.html
REDHAT RHSA-2009:1671
https://rhn.redhat.com/errata/RHSA-2009-1540.html
REDHAT RHSA-2009:1540
http://secunia.com/advisories/37086
SECUNIA 37086
http://www.openwall.com/lists/oss-security/2009/10/19/4
MLIST [oss-security] 20091019 Re: CVE request: kernel: AF_UNIX: Fix deadlock on connecting to shutdown socket
http://www.openwall.com/lists/oss-security/2009/10/19/2
MLIST [oss-security] 20091019 CVE request: kernel: AF_UNIX: Fix deadlock on connecting to shutdown socket
http://patchwork.kernel.org/patch/54678/ CONFIRM
http://lkml.org/lkml/2009/10/19/50
MLIST [linux-kernel] 20091019 Re: [PATCH] AF_UNIX: Fix deadlock on connecting to shutdown socket
https://bugzilla.redhat.com/show_bug.cgi?id=529626 CONFIRM
http://git.kernel.org/?p=linux/kernel/git/davem/net-2.6.git;a=commit;h=77238f2b942b38ab4e7f3aced44084493e4a8675 CONFIRM
http://secunia.com/advisories/38834
SECUNIA 38834
http://secunia.com/advisories/38794
SECUNIA 38794
http://www.vupen.com/english/advisories/2010/0528
VUPEN ADV-2010-0528
http://lists.vmware.com/pipermail/security-announce/2010/000082.html
MLIST [security-announce] 20100303 VMSA-2010-0004 ESX Service Console and vMA third party updates
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9921
OVAL oval:org.mitre.oval:def:9921
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6895
OVAL oval:org.mitre.oval:def:6895

- Metasploit Modules Related To CVE-2009-3621

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


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