Out-of-bounds Read in F5 Njs

CVE-2019-12207

njs through 0.3.1, used in NGINX, has a heap-based buffer over-read in nxt_utf8_decode in nxt/nxt_utf8.c.

Vulnerability class: Buffer Overflow

EPSS: 0.018 (76.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

F5 Njs
N/a — versions n/a

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2019-12207?: CVE-2019-12207 is a critical-severity vulnerability in F5 Njs, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2019-05-20.
How severe is CVE-2019-12207?: Critical severity. CVSS v3 base score is 9.8 out of 10.