Code execution via oversized record function name
Published Mar 7, 2024 · Updated Aug 27, 2024
Heap-based buffer overflow in zlog 1.1.0 through 1.2.17 allows attackers to execute arbitrary code via a crafted configuration rule. In zlog_rule_new(), an unbounded sscanf copies a user-defined output name from a 4,097-byte file_path buffer into the 1,025-byte record_name field, permitting overwrite of the adjacent record_func function pointer. Exploitation requires a consuming application to load an attacker-controlled configuration containing the oversized dollar-prefixed output name and then process a matching log entry.
Summary
What happened
Heap-based buffer overflow in zlog 1.1.0 through 1.2.17 allows attackers to execute arbitrary code via a crafted configuration rule. In zlog_rule_new(), an unbounded sscanf copies a user-defined output name from a 4,097-byte file_path buffer into the 1,025-byte record_name field, permitting overwrite of the adjacent record_func function pointer. Exploitation requires a consuming application to load an attacker-controlled configuration containing the oversized dollar-prefixed output name and then process a matching log entry.
The record
- CVE
- CVE-2024-22857
- Published
- Mar 7, 2024
- Updated
- Aug 27, 2024
- Vendor
- Zlog Project
- Product
- zlog
- Classifications
- CWE-122, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 7, 2024CVE publishedPublication date reported by the CVE source.
- Aug 27, 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=1.1.0 <=1.2.17
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
- Ebryx crafted-configuration proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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