Vulnerability identifier: #VU92846

Vulnerability risk: Low

CVSSv3.1: 3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C]

CVE-ID: CVE-2009-0028

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: Yes

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to perform service disruption.

The clone system call in the Linux kernel 2.6.28 and earlier allows local users to send arbitrary signals to a parent process from an unprivileged child process by launching an additional child process with the CLONE_PARENT flag, and then letting this new process exit.

Mitigation
Install update from vendor's repository.

Vulnerable software versions

Linux kernel:

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External links
http://lists.opensuse.org/opensuse-security-announce/2009-02/msg00003.html
http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00001.html
http://osvdb.org/52204
http://rhn.redhat.com/errata/RHSA-2009-0459.html
http://scary.beasts.org/security/CESA-2009-002.html
http://scarybeastsecurity.blogspot.com/2009/02/linux-kernel-minor-signal-vulnerability.html
http://secunia.com/advisories/33758
http://secunia.com/advisories/34033
http://secunia.com/advisories/34680
http://secunia.com/advisories/34917
http://secunia.com/advisories/34962
http://secunia.com/advisories/34981
http://secunia.com/advisories/35011
http://secunia.com/advisories/35120
http://secunia.com/advisories/35121
http://secunia.com/advisories/35390
http://secunia.com/advisories/35394
http://secunia.com/advisories/37471
http://wiki.rpath.com/Advisories:rPSA-2009-0084
http://www.debian.org/security/2009/dsa-1787
http://www.debian.org/security/2009/dsa-1794
http://www.debian.org/security/2009/dsa-1800
http://www.mandriva.com/security/advisories?name=MDVSA-2009:118
http://www.redhat.com/support/errata/RHSA-2009-0326.html
http://www.redhat.com/support/errata/RHSA-2009-0451.html
http://www.securityfocus.com/archive/1/503610/100/0/threaded
http://www.securityfocus.com/archive/1/507985/100/0/threaded
http://www.securityfocus.com/bid/33906
http://www.ubuntu.com/usn/usn-751-1
http://www.vmware.com/security/advisories/VMSA-2009-0016.html
http://www.vupen.com/english/advisories/2009/3316
http://bugzilla.redhat.com/show_bug.cgi?id=479932
http://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11187
http://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7947

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.