PT-2022-12768 · Cesanta · Cesanta Mjs

Hope-Fly · Published 2022-01-27 · Updated 2022-02-01 · CVE-2021-46523

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Cesanta MJS version 2.20.0

Description A heap buffer overflow issue was discovered in Cesanta MJS via the to json or debug function at mjs/src/mjs json.c. This issue can be exploited, potentially leading to unintended consequences.

Recommendations For Cesanta MJS version 2.20.0, consider disabling the to json or debug function as a temporary workaround until a patch is available. Restrict access to the mjs/src/mjs json.c module to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this issue.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-46523

Affected Products

Cesanta Mjs

References · 4

• 🔥 https://github.com/cesanta/mjs/issues/198 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-46523 · Security Note
• https://osv.dev/vulnerability/CVE-2021-46523 · Vendor Advisory
• https://t.me/cibsecurity/36410 · Telegram Post