VDB-173720 · CVE-2021-23133 · GCVE-0-2021-23133

Linux Kernel up to 5.12-rc7 SCTP Socket net/sctp/socket.c sctp_destroy_sock race condition

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.
7.6	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 5.12-rc7. This affects the function sctp_destroy_sock of the file net/sctp/socket.c of the component SCTP Socket Handler. Such manipulation leads to race condition. This vulnerability is referenced as CVE-2021-23133. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 5.12-rc7 (Operating System). Affected by this issue is the function sctp_destroy_sock of the file net/sctp/socket.c of the component SCTP Socket Handler. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is confidentiality, integrity, and availability.

The weakness was published 04/23/2021. The advisory is shared for download at openwall.com. This vulnerability is handled as CVE-2021-23133. There are known technical details, but no exploit is available.

Upgrading to version 5.12-rc8 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

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

License

open-source

Website

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

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.7

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.0
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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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: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.12-rc8
Patch: git.kernel.org

Timelineinfo

01/06/2021 🔍
04/23/2021 +106 days 🔍
04/23/2021 +0 days 🔍
04/29/2021 +6 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: openwall.com
Status: Confirmed

CVE: CVE-2021-23133 (🔍)
GCVE (CVE): GCVE-0-2021-23133
GCVE (VulDB): GCVE-100-173720

Entryinfo

Created: 04/23/2021 06:48
Updated: 04/29/2021 08:14
Changes: 04/23/2021 06:48 (43), 04/27/2021 09:20 (5), 04/27/2021 09:21 (1), 04/29/2021 08:14 (18)
Complete: 🔍
Cache ID: 216::103