CVE-2023-50044: Cesanta MJS 2.20.0 has a getprop_builtin_foreign out-of-bounds read if a Built-in API name occurs in a substring of an input string

Critical severity · published Dec 20, 2023

CVE-2023-50044

Cesanta MJS 2.20.0 has a getprop_builtin_foreign out-of-bounds read if a Built-in API name occurs in a substring of an input string

9.8

CVSS

0.9%

EPSS

On KEV

Description

Cesanta MJS 2.20.0 has a getprop_builtin_foreign out-of-bounds read if a Built-in API name occurs in a substring of an input string.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.9% · higher than 58% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Mjs · Cesanta

2.22.0 · source: NVD

Affected product

Mjs

Cesanta

All Mjs CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2023-50044

CVE.org

https://www.cve.org/CVERecord?id=CVE-2023-50044

Exploit

https://github.com/cesanta/mjs/issues/254

Patch

https://github.com/cesanta/mjs/pull/255