Out-of-bounds read and write via uninitialized length
Published May 27, 2024 · Updated Aug 1, 2024
Out-of-bounds access in Eclipse OpenJ9 0.13.0 through 0.43.0 allows local users to read and write beyond Java array bounds on IBM Z. The IBM Z arraycopy sequence can leave its byte-length register unevaluated before internal control flow, so overlapping System.arraycopy regions consume a garbage length while Concurrent Scavenge is active. Exploitation requires a local user, the -Xgc:concurrentScavenge option, Guarded Storage support, and overlapping source and destination regions; writes can corrupt JVM memory and reads can expose adjacent array data.
Summary
What happened
Out-of-bounds access in Eclipse OpenJ9 0.13.0 through 0.43.0 allows local users to read and write beyond Java array bounds on IBM Z. The IBM Z arraycopy sequence can leave its byte-length register unevaluated before internal control flow, so overlapping System.arraycopy regions consume a garbage length while Concurrent Scavenge is active. Exploitation requires a local user, the -Xgc:concurrentScavenge option, Guarded Storage support, and overlapping source and destination regions; writes can corrupt JVM memory and reads can expose adjacent array data.
The record
- CVE
- CVE-2024-3933
- Published
- May 27, 2024
- Updated
- Aug 1, 2024
- Vendor
- The Eclipse Foundation
- Product
- Eclipse OpenJ9
- Classifications
- CWE-125, CWE-787, CWE-805
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 27, 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=0.13.0 <0.44.0
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
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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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