PT-2021-4093 · Unknown · Jerryscript

Owl337 · Published 2021-01-11 · Updated 2021-06-16 · CVE-2021-26195

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions JerryScript version 2.4.0

Description The issue is related to a heap-buffer-overflow in the lexer parse number function in the js-lexer.c file. This can allow a remote attacker to access confidential data, compromise its integrity, and cause a denial of service.

Recommendations For JerryScript version 2.4.0, at the moment, there is no information about a newer version that contains a fix for this vulnerability. As a temporary workaround, consider disabling the lexer parse number function in the js-lexer.c file until a patch is available. Restrict access to the js-lexer.c file to minimize the risk of exploitation. Avoid using the lexer parse number function in the affected JerryScript version until the issue is resolved.

Exploit

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

BDU:2021-04672

CVE-2021-26195

Affected Products

Jerryscript

References · 9

• 🔥 https://github.com/jerryscript-project/jerryscript/issues/4442 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-26195 · Security Note
• https://osv.dev/vulnerability/CVE-2021-26195 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-26195 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-26195 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-26195 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-04672 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-26195 · Vendor Advisory
• https://t.me/cvenotify/16125 · Telegram Post