Linux Kernel 3.11-4.0 path_openat use after free

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5.2	$0-$5k	0.00

Summaryinfo

A vulnerability described as problematic has been identified in Linux Kernel 3.11-4.0. This issue affects the function path_openat. The manipulation results in use after free. This vulnerability is reported as CVE-2015-5706. No exploit exists. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel 3.11-4.0 (Operating System). Affected is the function path_openat. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was disclosed 08/01/2015 by Al Viro as confirmed mailinglist post (oss-sec). The advisory is shared for download at seclists.org. This vulnerability is traded as CVE-2015-5706 since 08/02/2015. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The reason for this vulnerability is this part of code:

goto out;

The vulnerability scanner Nessus provides a plugin with the ID 85281 (Debian DSA-3329-1 : linux - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175492 (Debian Security Update for linux (DSA 3329-1)).

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 6 days after the disclosure of the vulnerability. The vulnerability will be addressed with the following lines of code:

goto out2;

The vulnerability is also documented in the databases at X-Force (105236), Tenable (85281), SecurityFocus (BID 76142†) and Vulnerability Center (SBV-55459†). The entries VDB-76062, VDB-76352, VDB-76831 and VDB-76848 are pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

3.11-4.0

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

🔍

CPE 2.2info

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.9
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 85281
Nessus Name: Debian DSA-3329-1 : linux - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703329
OpenVAS Name: Debian Security Advisory DSA 3329-1 (linux - security update)
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

07/09/2015 🔍
08/01/2015 +23 days 🔍
08/01/2015 +0 days 🔍
08/02/2015 +0 days 🔍
08/03/2015 +1 days 🔍
08/07/2015 +3 days 🔍
08/10/2015 +3 days 🔍
08/31/2015 +21 days 🔍
12/30/2015 +121 days 🔍
06/07/2022 +2350 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-2680-1
Researcher: Al Viro
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-5706 (🔍)
GCVE (CVE): GCVE-0-2015-5706
GCVE (VulDB): GCVE-100-76872

OVAL: 🔍

X-Force: 105236 - Linux Kernel path_openat() code execution
SecurityFocus: 76142 - Linux Kernel 'path_openat()' Function Use After Free Memory Corruption Vulnerability
Vulnerability Center: 55459 - Linux kernel Local DoS and Other Unspecified Impact via O_TMPFILE Filesystem Operations, Medium

See also: 🔍

Entryinfo

Created: 08/03/2015 13:20
Updated: 06/07/2022 09:47
Changes: 08/03/2015 13:20 (72), 09/21/2018 10:22 (13), 06/07/2022 09:47 (4)
Complete: 🔍
Cache ID: 216:EBA:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.