VDB-185913 · CVE-2021-43267 · GCVE-0-2021-43267

Linux Kernel up to 5.14.15 Inter-Process Communication net/tipc/crypto.c tipc_crypto_key_rcv missing encryption

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.
6.9	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.14.15. It has been rated as problematic. This affects the function tipc_crypto_key_rcv of the file net/tipc/crypto.c of the component Inter-Process Communication. Performing a manipulation results in missing encryption. This vulnerability was named CVE-2021-43267. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 5.14.15 (Operating System). This affects the function tipc_crypto_key_rcv of the file net/tipc/crypto.c of the component Inter-Process Communication. The manipulation with an unknown input leads to a missing encryption vulnerability. CWE is classifying the issue as CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. This is going to have an impact on confidentiality.

The weakness was presented 11/03/2021 as fa40d9734a57bcbfa79a280189799f76c88f7bb0. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2021-43267 since 11/02/2021. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1600 for this issue.

Upgrading to version 5.14.16 eliminates this vulnerability. The upgrade is hosted for download at cdn.kernel.org. Applying the patch fa40d9734a57bcbfa79a280189799f76c88f7bb0 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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

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: 7.1
VulDB Meta Temp Score: 6.9

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Missing encryption
CWE: CWE-311 / CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
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 5.14.16
Patch: fa40d9734a57bcbfa79a280189799f76c88f7bb0

Timelineinfo

11/02/2021 🔍
11/03/2021 +1 days 🔍
11/03/2021 +0 days 🔍
11/06/2021 +3 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: fa40d9734a57bcbfa79a280189799f76c88f7bb0
Status: Confirmed

CVE: CVE-2021-43267 (🔍)
GCVE (CVE): GCVE-0-2021-43267
GCVE (VulDB): GCVE-100-185913

Entryinfo

Created: 11/03/2021 07:18
Updated: 11/06/2021 08:59
Changes: 11/03/2021 07:18 (47), 11/06/2021 08:57 (1), 11/06/2021 08:59 (18)
Complete: 🔍
Cache ID: 216::103