2020-22876 | QuickJS quickjs.c buffer overflow

By Max On Jul 16, 2021

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.
4.1	$0-$5k	0.47

A vulnerability was found in QuickJS (affected version not known). It has been rated as critical. Affected by this issue is some unknown functionality of the file quickjs.c. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-120. Impacted is availability. CVE summarizes:

Buffer Overflow vulnerability in quickjs.c in QuickJS, allows remote attackers to cause denial of service. This issue is resolved in the 2020-07-05 release.

The weakness was published 07/13/2021. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2020-22876 since 08/13/2020. The exploitation is known to be easy. The attack may be launched remotely. A simple authentication is required for exploitation. There are known technical details, but no exploit is available.

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

Name

QuickJS

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VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

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

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Class: Memory corruption
CWE: CWE-120
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: github.com

07/05/2020 Countermeasure disclosed
08/13/2020 +39 days CVE assigned
07/13/2021 +334 days Advisory disclosed
07/13/2021 +0 days VulDB entry created
07/16/2021 +3 days VulDB last updateAdvisory: github.com
Status: Confirmed