#VU43163 Buffer overflow in Linux kernel - CVE-2012-2119

Vulnerability identifier: #VU43163

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2012-2119

CWE-ID: CWE-119

Exploitation vector: Local network

Exploit availability: No

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

Vendor: Linux Foundation

Description

The vulnerability allows a remote #AU# to perform a denial of service (DoS) attack.

Buffer overflow in the macvtap device driver in the Linux kernel before 3.4.5, when running in certain configurations, allows privileged KVM guest users to cause a denial of service (crash) via a long descriptor with a long vector length.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 3.4 - 3.4.3

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External links
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=814278
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b92946e2919134ebe2a4083e4302236295ea2a73
https://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html
https://marc.info/?l=linux-netdev&m=133455718001608&w=2
https://rhn.redhat.com/errata/RHSA-2012-0743.html
https://ubuntu.com/usn/usn-1529-1
https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.5
https://www.openwall.com/lists/oss-security/2012/04/19/14
https://github.com/torvalds/linux/commit/b92946e2919134ebe2a4083e4302236295ea2a73
https://oss.oracle.com/git/?p=redpatch.git;a=commit;h=4aae94d1c7b32316911c86176c0ed4f8ed62da73

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.