Bug 1349741 (CVE-2016-5011) - CVE-2016-5011 util-linux: Extended partition loop in MBR partition table leads to DOS
Summary: CVE-2016-5011 util-linux: Extended partition loop in MBR partition table lead...
Alias: CVE-2016-5011
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1349536 1354450
Blocks: 1349742
TreeView+ depends on / blocked
Reported: 2016-06-24 06:57 UTC by Andrej Nemec
Modified: 2021-02-17 03:39 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
It was found that util-linux's libblkid library did not properly handle Extended Boot Record (EBR) partitions when reading MS-DOS partition tables. An attacker with physical USB access to a protected machine could insert a storage device with a specially crafted partition table that could, for example, trigger an infinite loop in systemd-udevd, resulting in a denial of service on that machine.
Clone Of:
Last Closed: 2016-11-04 08:57:21 UTC

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:2605 0 normal SHIPPED_LIVE Low: util-linux security, bug fix, and enhancement update 2016-11-03 12:13:26 UTC

Description Andrej Nemec 2016-06-24 06:57:34 UTC
By connecting a storage medium containing a specially crafted MBR a local user can cause a Linux system to become unresponsive.

Product bug:


Comment 1 Andrej Nemec 2016-06-24 06:57:40 UTC

Name: Michael Gruhn
Upstream: Christian Moch

Comment 2 Cedric Buissart 2016-07-11 07:30:07 UTC
Patch : upstream commit 7164a1c34d18831ac61c6744ad14ce916d389b3f :

Comment 3 Cedric Buissart 2016-07-11 11:00:18 UTC
Created util-linux tracking bugs for this issue:

Affects: fedora-all [bug 1354450]

Comment 5 Cedric Buissart 2016-07-12 15:24:49 UTC
Additional patch, to prevent non-zero recursion :

Comment 8 errata-xmlrpc 2016-11-03 21:27:42 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2605 https://rhn.redhat.com/errata/RHSA-2016-2605.html

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