Unauthenticated service interruption via DNS request flood
Published Feb 16, 2023 · Updated Aug 2, 2024
Denial of service in Cisco Nexus Dashboard before 2.3(1c) allows remote attackers to interrupt service via DNS requests. The DNS functionality improperly processes a continuous stream of requests, stopping the CoreDNS service or forcing the device to reload. No authentication or user interaction is required; the bounded impact is a CoreDNS outage or full device reload, not data exposure or modification.
Summary
What happened
Denial of service in Cisco Nexus Dashboard before 2.3(1c) allows remote attackers to interrupt service via DNS requests. The DNS functionality improperly processes a continuous stream of requests, stopping the CoreDNS service or forcing the device to reload. No authentication or user interaction is required; the bounded impact is a CoreDNS outage or full device reload, not data exposure or modification.
The record
- CVE
- CVE-2023-20014
- Published
- Feb 16, 2023
- Updated
- Aug 2, 2024
- Vendor
- ClamAV
- Product
- Cisco Nexus Dashboard
- Classifications
- CWE-400, CWE-399, T1499.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 16, 2023CVE publishedPublication date reported by the CVE source.
- Aug 2, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.1(0c)
- Affected versionversion=1.1(0d)
- Affected versionversion=1.1(2h)
- Affected versionversion=1.1(2i)
- Affected versionversion=1.1(3c)
- Affected versionversion=1.1(3d)
- Affected versionversion=1.1(3e)
- Affected versionversion=1.1(3f)
- Affected versionversion=2.0(1b)
- Affected versionversion=2.0(1d)
- Affected versionversion=2.0(2g)
- Affected versionversion=2.0(2h)
- Affected versionversion=2.1(1d)
- Affected versionversion=2.1(1e)
- Affected versionversion=2.1(2d)
- Affected versionversion=2.1(2f)
- Affected versionversion=2.2(1e)
- Affected versionversion=2.2(1h)
- Affected versionversion=2.2(2d)
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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