util-linux libblkid partitions/dos.c parse_dos_extended resource management

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability was found in util-linux. It has been declared as problematic. This vulnerability affects the function parse_dos_extended of the file partitions/dos.c of the component libblkid. The manipulation results in resource management. This vulnerability is cataloged as CVE-2016-5011. An attack on the physical device is feasible. There is no exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability, which was classified as problematic, was found in util-linux (version now known). Affected is the function parse_dos_extended of the file partitions/dos.c of the component libblkid. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability.

The weakness was shared 07/07/2016 as confirmed git commit (GIT Repository). The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2016-5011 since 05/24/2016. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The reason for this vulnerability is this part of code: 

if (size && is_extended(p))
   break;

The vulnerability scanner Nessus provides a plugin with the ID 95351 (CentOS 7 : util-linux (CESA-2016:2605)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169593 (OpenSuSE Security Update for util-linux (openSUSE-SU-2016:3102-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. A possible mitigation has been published immediately after the disclosure of the vulnerability. The vulnerability will be addressed with the following lines of code:

if (size && is_extended(p)) {
   if (start == 0)
      DBG(LOWPROBE, ul_debug("#%d: EBR link offset is zero -- ignore", i + 1));
   else
      break;
   }
}

The vulnerability is also documented in the databases at Tenable (95351), SecurityFocus (BID 91683†) and SecurityTracker (ID 1036272†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.3
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 95351
Nessus Name: CentOS 7 : util-linux (CESA-2016:2605)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 871165
OpenVAS Name: RedHat Update for util-linux RHSA-2016:2605-02
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: git.kernel.org

Timelineinfo

05/24/2016 🔍
07/07/2016 +44 days 🔍
07/07/2016 +0 days 🔍
07/11/2016 +4 days 🔍
07/12/2016 +1 days 🔍
07/12/2016 +0 days 🔍
11/28/2016 +139 days 🔍
04/11/2017 +134 days 🔍
09/29/2024 +2727 days 🔍

Sourcesinfo

Advisory: RHSA-2016:2605
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-5011 (🔍)
GCVE (CVE): GCVE-0-2016-5011
GCVE (VulDB): GCVE-100-89004
SecurityFocus: 91683 - util-linux CVE-2016-5011 Local Denial of Service Vulnerability
SecurityTracker: 1036272

Entryinfo

Created: 07/12/2016 19:58
Updated: 09/29/2024 00:01
Changes: 07/12/2016 19:58 (68), 02/22/2019 14:00 (12), 09/01/2022 13:32 (4), 09/29/2024 00:01 (16)
Complete: 🔍
Cache ID: 216:EB4:103

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