Vulnerability identifier: #VU64464

Vulnerability risk: Low

CVSSv3.1: 4 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-5011

CWE-ID: CWE-401

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Util-linux
Universal components / Libraries / Libraries used by multiple products

Vendor: kernel.org

Description
The vulnerability allows an attacker with physical access to perform DoS attack on the target system.

The vulnerability exists due memory leak in the parse_dos_extended function in partitions/dos.c in the libblkid library in util-linux. An attacker with physical USB access can perform denial of service attack via a crafted MSDOS partition table with an extended partition boot record at zero offset.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Util-linux: 2.2 - 2.28.2

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External links
http://rhn.redhat.com/errata/RHSA-2016-2605.html
http://www.openwall.com/lists/oss-security/2016/07/11/2
http://www.securityfocus.com/bid/91683
http://www.securitytracker.com/id/1036272
http://www-01.ibm.com/support/docview.wss?uid=isg3T1024543
http://www-01.ibm.com/support/docview.wss?uid=nas8N1021801
http://git.kernel.org/pub/scm/utils/util-linux/util-linux.git/commit/?id=7164a1c3

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Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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