Remote code execution via unvalidated server objects
Published Oct 4, 2023 · Updated Sep 19, 2024
Unsafe deserialization in Redisson before 3.22.0 allows remote attackers to execute arbitrary code through malicious Redis responses. When SerializationCodec handles an object response, CommandDecoder passes attacker-controlled bytes to ObjectInputStream.readObject without a class allowlist. Exploitation requires the affected codec, communication with a malicious Redis server, and a usable gadget chain on the application classpath, enabling compromise of the client host.
Summary
What happened
Unsafe deserialization in Redisson before 3.22.0 allows remote attackers to execute arbitrary code through malicious Redis responses. When SerializationCodec handles an object response, CommandDecoder passes attacker-controlled bytes to ObjectInputStream.readObject without a class allowlist. Exploitation requires the affected codec, communication with a malicious Redis server, and a usable gadget chain on the application classpath, enabling compromise of the client host.
The record
- CVE
- CVE-2023-42809
- Published
- Oct 4, 2023
- Updated
- Sep 19, 2024
- Vendor
- Redisson
- Product
- Redisson
- Classifications
- CWE-502, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 4, 2023CVE publishedPublication date reported by the CVE source.
- Sep 19, 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=< 3.22.0
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
- GitHub Security Lab malicious Redis server proof of conceptproof of concept · demonstrated
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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