Memory disclosure via in-place state mutation
Published Sep 17, 2021 · Updated Aug 4, 2024
Use-after-free in Tremor Runtime 0.7.3 through 0.11.5 allows remote attackers to read freed memory through crafted event data. In-place merge and patch operations store borrowed event strings in persistent state without cloning them, leaving references valid after the event buffer is freed. Exploitation requires a deployed script that merges or patches event-derived values into state and then exposes stored state over TCP or HTTP.
Summary
What happened
Use-after-free in Tremor Runtime 0.7.3 through 0.11.5 allows remote attackers to read freed memory through crafted event data. In-place merge and patch operations store borrowed event strings in persistent state without cloning them, leaving references valid after the event buffer is freed. Exploitation requires a deployed script that merges or patches event-derived values into state and then exposes stored state over TCP or HTTP.
The record
- CVE
- CVE-2021-39228
- Published
- Sep 17, 2021
- Updated
- Aug 4, 2024
- Vendor
- Tremor
- Product
- Tremor Runtime
- Classifications
- CWE-416, CWE-825
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 17, 2021CVE 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=> 0.7.2, < 0.11.6
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.
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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