CVE Vulnerability

CVE-2021-31875

** DISPUTED ** In mjs_json.c in Cesanta MongooseOS mJS 1.26, a maliciously formed JSON string can trigger an off-by-one heap-based buffer overflow in mjs_json_parse, which can potentially lead to redirection of control flow. NOTE: the original reporter disputes the significance of this finding because "there isn’t very much of an opportunity to exploit this reliably for an information leak, so there isn’t any real security impact."

7.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

9.8 /10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/418sec/mjs/pull/2 Patch Third Party Advisory
https://github.com/cesanta/mjs/releases/tag/1.26 Third Party Advisory
https://huntr.dev/bounties/1-other-mjs/ Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:cesanta:mongooseos_mjs:1.26:*:*:*:*:*:*:*
Information

Published : 2021-04-29 02:15

Updated : 2022-12-27 08:15

NVD link : CVE-2021-31875

Mitre link : CVE-2021-31875

Products Affected
No products.
CWE
CWE-193

Off-by-one Error

CWE-787