Linux Kernel sys_sendto/sys_recvfrom access control

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.6	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Linux Kernel. Affected by this issue is the function sys_sendto/sys_recvfrom. Performing a manipulation results in access control. This vulnerability is reported as CVE-2015-2686. No exploit exists. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel (Operating System) (affected version not known). This affects the function sys_sendto/sys_recvfrom. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on integrity.

The weakness was disclosed 03/23/2015 by Petr Matousek as confirmed mailinglist post (oss-sec). The advisory is shared at seclists.org. This vulnerability is uniquely identified as CVE-2015-2686 since 03/23/2015. The exploitability is told to be easy. An attack has to be approached locally. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 157500 (Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel (ELSA-2017-3597)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org.

The vulnerability is also documented in the databases at X-Force (101742), SecurityFocus (BID 73286†) and Vulnerability Center (SBV-49185†). The entries VDB-74103 and VDB-90515 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

License

open-source

Website

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

CPE 2.3info

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CPE 2.2info

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.6

VulDB Base Score: 4.0
VulDB Temp Score: 3.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
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

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

03/20/2015 🔍
03/20/2015 +0 days 🔍
03/23/2015 +3 days 🔍
03/23/2015 +0 days 🔍
03/24/2015 +1 days 🔍
03/24/2015 +0 days 🔍
05/02/2016 +405 days 🔍
04/16/2022 +2175 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 4de930efc23b92ddf88ce91c405ee645fe6e27ea
Researcher: Petr Matousek
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-2686 (🔍)
GCVE (CVE): GCVE-0-2015-2686
GCVE (VulDB): GCVE-100-74097
X-Force: 101742 - Linux Kernel sys_sendto security bypass
SecurityFocus: 73286 - Linux Kernel 'iov_iter_init()' Function Security Bypass Vulnerability
Vulnerability Center: 49185 - Linux Kernel <=3.19 Remote Security Bypass Restrictions via the 'iov_iter_init()\x27 Function, Medium

See also: 🔍

Entryinfo

Created: 03/24/2015 09:42
Updated: 04/16/2022 06:40
Changes: 03/24/2015 09:42 (70), 06/23/2017 10:34 (5), 04/16/2022 06:40 (5)
Complete: 🔍
Cache ID: 216:92F:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.