Vulnerabilities > CVE-2021-31875 - Off-by-one Error vulnerability in Cesanta Mongooseos MJS 1.26

047910
CVSS 9.8 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
cesanta
CWE-193
critical

Summary

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."

Vulnerable Configurations

Part Description Count
Application
Cesanta
1

Common Weakness Enumeration (CWE)