Attacker Value
Unknown
CVE-2021-23017
CVE-2021-23017
(Last updated February 22, 2025) ▾
MITRE ATT&CK
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Execution
Techniques
Validation
Description
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.
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CVSS V3 Severity and Metrics
Data provided by the National Vulnerability Database (NVD)
Base Score:
7.7 High
Impact Score:
5.5
Exploitability Score:
2.2
Attack Vector (AV):
Network
Attack Complexity (AC):
High
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
Low
General Information
Vendors
Products
- blockchain platform,
- communications control plane monitor 3.4,
- communications control plane monitor 4.2,
- communications control plane monitor 4.3,
- communications control plane monitor 4.4,
- communications fraud monitor,
- communications operations monitor 3.4,
- communications operations monitor 4.2,
- communications operations monitor 4.3,
- communications operations monitor 4.4,
- communications session border controller 8.4,
- communications session border controller 9.0,
- enterprise communications broker 3.3.0,
- enterprise session border controller 8.4,
- enterprise session border controller 9.0,
- enterprise telephony fraud monitor 3.4,
- enterprise telephony fraud monitor 4.2,
- enterprise telephony fraud monitor 4.3,
- enterprise telephony fraud monitor 4.4,
- fedora 33,
- fedora 34,
- goldengate,
- nginx,
- ontap select deploy administration utility -,
- openresty
Weaknesses
References
Advisory
Miscellaneous
