Linux Kernel up to 4.5.x ext2/ext4 data processing

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 4.5.x and classified as problematic. The affected element is an unknown function of the component ext2/ext4. This manipulation causes data processing. This vulnerability is registered as CVE-2015-8952. The attack needs to be launched locally. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.5.x (Operating System). It has been declared as problematic. Affected by this vulnerability is an unknown part of the component ext2/ext4. The manipulation with an unknown input leads to a data processing vulnerability. The CWE definition for the vulnerability is CWE-19. As an impact it is known to affect availability. The summary by CVE is:

The mbcache feature in the ext2 and ext4 filesystem implementations in the Linux kernel before 4.6 mishandles xattr block caching, which allows local users to cause a denial of service (soft lockup) via filesystem operations in environments that use many attributes, as demonstrated by Ceph and Samba.

The weakness was published 10/16/2016 (Website). The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2015-8952 since 08/25/2016. The exploitation appears to be easy. An attack has to be approached locally. A single authentication is necessary for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 99159 (Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2017-3533)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157420 (Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel (ELSA-2017-3533)).

Upgrading to version 4.6 eliminates this vulnerability. A possible mitigation has been published 6 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (99159). Similar entries are available at VDB-92729, VDB-92726 and VDB-92724. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Data processing
CWE: CWE-19
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 99159
Nessus Name: Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2017-3533)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 800219
OpenVAS Name: Ubuntu Update for linux-aws USN-3582-2
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Kernel 4.6
Patch: git.kernel.org

Timelineinfo

08/25/2016 🔍
10/16/2016 +52 days 🔍
10/16/2016 +0 days 🔍
10/17/2016 +1 days 🔍
04/01/2017 +166 days 🔍
04/03/2017 +2 days 🔍
09/26/2022 +2002 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 82939d7999dfc1f1998c4b1c12e2f19edbdff272
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-8952 (🔍)
GCVE (CVE): GCVE-0-2015-8952
GCVE (VulDB): GCVE-100-92725
See also: 🔍

Entryinfo

Created: 10/17/2016 10:25
Updated: 09/26/2022 09:56
Changes: 10/17/2016 10:25 (66), 05/11/2019 00:36 (11), 09/26/2022 09:55 (4), 09/26/2022 09:56 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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