VDB-178890 · CVE-2020-36426 · GCVE-0-2020-36426

ARM Mbed TLS up to 2.7.16/2.16.7/2.23.x mbedtls_x509_crl_parse_der buffer overflow

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.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in ARM Mbed TLS up to 2.7.16/2.16.7/2.23.x. This affects the function mbedtls_x509_crl_parse_der. The manipulation results in buffer overflow. This vulnerability is known as CVE-2020-36426. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in ARM Mbed TLS up to 2.7.16/2.16.7/2.23.x. It has been classified as critical. Affected is the function mbedtls_x509_crl_parse_der. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was published 07/19/2021. The advisory is available at bugs.gentoo.org. This vulnerability is traded as CVE-2020-36426. Technical details are known, but there is no available exploit.

Upgrading to version 2.7.17, 2.16.8 or 2.24.0 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Name

Mbed TLS

Version

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

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: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

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: Mbed TLS 2.7.17/2.16.8/2.24.0

Timelineinfo

07/19/2021 🔍
07/19/2021 +0 days 🔍
07/19/2021 +0 days 🔍
07/22/2021 +3 days 🔍

Sourcesinfo

Advisory: bugs.gentoo.org
Status: Confirmed

CVE: CVE-2020-36426 (🔍)
GCVE (CVE): GCVE-0-2020-36426
GCVE (VulDB): GCVE-100-178890

Entryinfo

Created: 07/19/2021 21:42
Updated: 07/22/2021 10:12
Changes: 07/19/2021 21:42 (38), 07/22/2021 10:12 (2)
Complete: 🔍
Cache ID: 216::103