What is CVE-2019-6991?

CVE-2019-6991 is a critical-severity vulnerability in Zoneminder, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2019-01-28.

How severe is CVE-2019-6991?

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

Is CVE-2019-6991 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Zoneminder

CVE-2019-6991

A classic Stack-based buffer overflow exists in the zmLoadUser() function in zm_user.cpp of the zmu binary in ZoneMinder through 1.32.3, allowing an unauthenticated attacker to execute code via a long username.

Vulnerability class: Buffer Overflow

EPSS: 0.033 (87.3th 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

Zoneminder
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

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

Frequently asked questions

What is CVE-2019-6991?: CVE-2019-6991 is a critical-severity vulnerability in Zoneminder, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2019-01-28.
How severe is CVE-2019-6991?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2019-6991 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.