What is CVE-2021-31875?

CVE-2021-31875 is a critical-severity vulnerability in Cesanta Mongooseos_mjs, classified under Off-by-one Error. CVSS score: 9.8/10. Published 2021-04-29.

How severe is CVE-2021-31875?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Cesanta Mongooseos_mjs

CVE-2021-31875

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 d…

EPSS: 0.022 (80.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Cesanta Mongooseos_mjs — versions 1.26
N/a — versions n/a

Weakness classification (CWE)

References

cve@mitre.org (Exploit, Third Party Advisory)
cve@mitre.org (Patch, Third Party Advisory)
cve@mitre.org (Third Party Advisory, Release Notes)

Frequently asked questions

What is CVE-2021-31875?: CVE-2021-31875 is a critical-severity vulnerability in Cesanta Mongooseos_mjs, classified under Off-by-one Error. CVSS score: 9.8/10. Published 2021-04-29.
How severe is CVE-2021-31875?: Critical severity. CVSS v3 base score is 9.8 out of 10.