#VU28484 Reachable Assertion in JerryScript - CVE-2020-13622

Vulnerability identifier: #VU28484

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-13622

CWE-ID: CWE-617

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
JerryScript
Web applications / JS libraries

Vendor: JerryScript

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion when property key query for a Proxy object returns unintended data. A remote attacker can cause a denial of service condition on the target system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

JerryScript: 2.2.0

---

External links
https://github.com/jerryscript-project/jerryscript/issues/3787
https://github.com/jerryscript-project/jerryscript/pull/3797
https://exchange.xforce.ibmcloud.com/vulnerabilities/182617

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.