PT-2020-6416 · Unknown · Jerryscript

Chong + 1 · Published 2020-06-03 · Updated 2021-06-16 · CVE-2020-23319

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions JerryScript version 2.2.0

Description The issue is related to an assertion in the parser emit cbc backward branch function in the js-parser-util.c component of the JerryScript engine for the Internet of Things. This assertion is '(flags >> CBC STACK ADJUST SHIFT) >= CBC STACK ADJUST BASE || (CBC STACK ADJUST BASE - (flags >> CBC STACK ADJUST SHIFT)) <= context p->stack depth'. The vulnerability is associated with insufficient use of the assert() function. Exploitation of this issue could allow a remote attacker to cause a denial of service.

Recommendations For JerryScript version 2.2.0, as a temporary workaround, consider disabling the parser emit cbc backward branch function until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Assertion Failure

Weakness Enumeration

CWE-617

Related Identifiers

BDU:2021-04636

CVE-2020-23319

Affected Products

Jerryscript

References · 8

• 🔥 https://github.com/jerryscript-project/jerryscript/issues/3834 · Exploit
• https://ubuntu.com/security/CVE-2020-23319 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-04636 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2020-23319 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-23319 · Security Note
• https://osv.dev/vulnerability/CVE-2020-23319 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-23319 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-23319 · Vendor Advisory