PT-2023-31461 · Cesanta · Mjs

Pip-Izony · Published 2023-12-20 · Updated 2023-12-29 · CVE-2023-50044

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Cesanta MJS versions 2.20.0 through 2.22.0

Description The issue is related to an out-of-bounds read in the getprop builtin foreign function when a Built-in API name occurs in a substring of an input string. This can lead to a buffer overflow, allowing attackers to execute arbitrary code, cause a denial of service, and obtain sensitive information. A segmentation fault can occur when the input string includes a name of Built-in APIs.

Recommendations For Cesanta MJS versions 2.20.0 through 2.22.0, consider disabling the getprop builtin foreign function until a patch is available to prevent potential exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2023-50044

Affected Products

Mjs

References · 6

• 🔥 https://github.com/cesanta/mjs/issues/254 · Exploit
• https://github.com/cesanta/mjs/pull/255 · Patch
• https://osv.dev/vulnerability/CVE-2023-50044 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-50044 · Security Note
• https://twitter.com/CVEnew/status/1737395545918832978 · Twitter Post
• https://t.me/cvenotify/64362 · Telegram Post