SNMP access-control bypass via broadcast UDP forwarding
Published Mar 13, 2024 · Updated Aug 1, 2024
Access control bypass in Cisco IOS XR Software allows remote attackers on an adjacent network to reach protected SNMP ports via broadcast UDP. The UDP forwarding code incorrectly programs forwarding when SNMP uses management plane protection, allowing broadcast-destined operations to bypass its ACL. The device must run an affected release with management plane protection and SNMP enabled; authentication is still required to retrieve or modify data.
Summary
What happened
Access control bypass in Cisco IOS XR Software allows remote attackers on an adjacent network to reach protected SNMP ports via broadcast UDP. The UDP forwarding code incorrectly programs forwarding when SNMP uses management plane protection, allowing broadcast-destined operations to bypass its ACL. The device must run an affected release with management plane protection and SNMP enabled; authentication is still required to retrieve or modify data.
The record
- CVE
- CVE-2024-20319
- Published
- Mar 13, 2024
- Updated
- Aug 1, 2024
- Vendor
- ClamAV
- Product
- Cisco IOS XR Software
- Classifications
- CWE-284
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 13, 2024CVE publishedPublication date reported by the CVE source.
- Aug 1, 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=5.2.0
- Affected versionversion=5.2.1
- Affected versionversion=5.2.2
- Affected versionversion=5.2.3
- Affected versionversion=5.2.4
- Affected versionversion=5.2.47
- Affected versionversion=5.2.5
- Affected versionversion=5.3.0
- Affected versionversion=5.3.1
- Affected versionversion=5.3.2
- Affected versionversion=5.3.3
- Affected versionversion=5.3.4
- Affected versionversion=6.0.0
- Affected versionversion=6.0.1
- Affected versionversion=6.0.2
- Affected versionversion=6.1.1
- Affected versionversion=6.1.12
- Affected versionversion=6.1.2
- Affected versionversion=6.1.22
- Affected versionversion=6.1.3
- Affected versionversion=6.1.32
- Affected versionversion=6.1.36
- Affected versionversion=6.1.4
- Affected versionversion=6.1.42
- Affected versionversion=6.2.1
- Affected versionversion=6.2.11
- Affected versionversion=6.2.2
- Affected versionversion=6.2.25
- Affected versionversion=6.2.3
- Affected versionversion=6.3.15
- Affected versionversion=6.3.2
- Affected versionversion=6.3.3
- Affected versionversion=6.4.1
- Affected versionversion=6.4.2
- Affected versionversion=6.4.3
- Affected versionversion=6.5.1
- Affected versionversion=6.5.2
- Affected versionversion=6.5.25
- Affected versionversion=6.5.26
- Affected versionversion=6.5.28
- Affected versionversion=6.5.29
- Affected versionversion=6.5.3
- Affected versionversion=6.5.32
- Affected versionversion=6.5.33
- Affected versionversion=6.6.2
- Affected versionversion=6.6.25
- Affected versionversion=6.6.3
- Affected versionversion=6.6.4
- Affected versionversion=6.7.1
- Affected versionversion=6.7.2
- Affected versionversion=6.7.3
- Affected versionversion=6.7.4
- Affected versionversion=6.8.1
- Affected versionversion=6.8.2
- Affected versionversion=6.9.1
- Affected versionversion=6.9.2
- Affected versionversion=7.0.1
- Affected versionversion=7.0.12
- Affected versionversion=7.0.14
- Affected versionversion=7.0.2
- Affected versionversion=7.10.1
- Affected versionversion=7.10.2
- Affected versionversion=7.1.1
- Affected versionversion=7.11.1
- Affected versionversion=7.1.15
- Affected versionversion=7.1.2
- Affected versionversion=7.1.3
- Affected versionversion=7.2.0
- Affected versionversion=7.2.1
- Affected versionversion=7.2.2
- Affected versionversion=7.3.1
- Affected versionversion=7.3.15
- Affected versionversion=7.3.2
- Affected versionversion=7.3.3
- Affected versionversion=7.3.5
- Affected versionversion=7.3.6
- Affected versionversion=7.4.1
- Affected versionversion=7.4.2
- Affected versionversion=7.5.1
- Affected versionversion=7.5.2
- Affected versionversion=7.5.3
- Affected versionversion=7.5.4
- Affected versionversion=7.5.5
- Affected versionversion=7.6.1
- Affected versionversion=7.6.2
- Affected versionversion=7.7.1
- Affected versionversion=7.7.2
- Affected versionversion=7.7.21
- Affected versionversion=7.8.1
- Affected versionversion=7.8.2
- Affected versionversion=7.9.1
- Affected versionversion=7.9.2
- Affected versionversion=7.9.21
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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