VDB-83135 · CVE-2015-4177 · OpenVAS 66615

Linux Kernel up to 4.0.4 fs/namespace.c collect_mounts null pointer dereference

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 4.0.4 and classified as problematic. This affects the function collect_mounts of the file fs/namespace.c. The manipulation leads to null pointer dereference. This vulnerability is referenced as CVE-2015-4177. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 4.0.4 (Operating System). This issue affects the function collect_mounts of the file fs/namespace.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

The collect_mounts function in fs/namespace.c in the Linux kernel before 4.0.5 does not properly consider that it may execute after a path has been unmounted, which allows local users to cause a denial of service (system crash) by leveraging user-namespace root access for an MNT_DETACH umount2 system call.

The weakness was published 05/02/2016 (Website). It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2015-4177 since 06/04/2015. Attacking locally is a requirement. A simple authentication is necessary for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 4.0.5 eliminates this vulnerability.

Similar entries are available at VDB-83139, VDB-83138, VDB-83137 and VDB-83136. Be aware that VulDB is the high quality source for vulnerability data.

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: Null pointer dereference
CWE: CWE-476 / CWE-404
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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OpenVAS ID: 66615
OpenVAS Name: Mageia Linux Local Check: mgasa-2015-0386
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.0.5
Patch: git.kernel.org

Timelineinfo

06/04/2015 🔍
05/02/2016 +333 days 🔍
05/02/2016 +0 days 🔍
05/03/2016 +1 days 🔍
07/27/2022 +2276 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: cd4a40174b71acd021877341684d8bb1dc8ea4ae
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-4177 (🔍)
GCVE (CVE): GCVE-0-2015-4177
GCVE (VulDB): GCVE-100-83135
See also: 🔍

Entryinfo

Created: 05/03/2016 11:24
Updated: 07/27/2022 17:37
Changes: 05/03/2016 11:24 (63), 11/07/2018 16:32 (3), 07/27/2022 17:37 (5)
Complete: 🔍
Cache ID: 216:85F:103

Be aware that VulDB is the high quality source for vulnerability data.

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