Cyber Resilience

CVE-2021-23017

HighPublic PoC

Published: 01 June 2021

Published
01 June 2021
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1 7.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
EPSS Score 0.7317 98.8th percentile
Risk Priority 59 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-23017 is a high-severity Off-by-one Error (CWE-193) vulnerability in Oracle Communications Control Plane Monitor. Its CVSS base score is 7.7 (High).

Operationally, ranked in the top 1.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

A security issue in nginx resolver was identified, which might allow an attacker who is able to forge UDP packets from the DNS server to cause 1-byte memory overwrite, resulting in worker process crash or potential other impact.

CWE(s)
CWE-193

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

f5
nginx
0.6.18 — 1.20.1
openresty
openresty
≤ 1.19.3.2
fedoraproject
fedora
33, 34
netapp
ontap select deploy administration utility
all versions
oracle
blockchain platform
≤ 21.1.2
oracle
communications control plane monitor
3.4, 4.2, 4.3, 4.4
oracle
communications fraud monitor
3.4 — 4.4
oracle
communications operations monitor
3.4, 4.2, 4.3, 4.4
oracle
communications session border controller
8.4, 9.0
oracle
enterprise communications broker
3.3.0
+3 more product configuration(s) — see NVD for full list

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References