Service interruption via malformed iRules datagram input
Published Apr 30, 2020 · Updated Aug 4, 2024
Denial of service in affected F5 Networks BIG-IP releases allows remote attackers to interrupt service via malformed datagram input. The DATAGRAM::tcp iRules command processes malformed input when invoked from a FLOW_INIT event, but F5 has not disclosed the internal validation failure. Exposure requires an iRule that invokes this command in that event; the documented consequence is availability loss without data disclosure or modification.
Summary
What happened
Denial of service in affected F5 Networks BIG-IP releases allows remote attackers to interrupt service via malformed datagram input. The DATAGRAM::tcp iRules command processes malformed input when invoked from a FLOW_INIT event, but F5 has not disclosed the internal validation failure. Exposure requires an iRule that invokes this command in that event; the documented consequence is availability loss without data disclosure or modification.
The record
- CVE
- CVE-2020-5877
- Published
- Apr 30, 2020
- Updated
- Aug 4, 2024
- Vendor
- F5 Networks
- Product
- BIG-IP
- Classifications
- T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 30, 2020CVE publishedPublication date reported by the CVE source.
- Aug 4, 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=15.0.0-15.1.0.1, 14.1.0-14.1.2.3, 13.1.0-13.1.3.3, 12.1.0-12.1.5.1, 11.6.1-11.6.5.1
What conditions does exploitation require?
What is affected?
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.
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Technologies
Your stack
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Your stack
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