Application interruption via recursive YAML anchor expansion
Published Aug 25, 2023 · Updated Oct 2, 2024
Denial of service in Esoteric YamlBeans 1.15 and earlier allows attackers to interrupt applications with crafted YAML input. YamlReader accepts recursively nested anchor aliases without an expansion limit, creating a data graph whose traversal multiplies work. An application must read attacker-controlled YAML and then recursively traverse or stringify the result, consuming CPU and memory until it hangs or raises a Java OutOfMemoryError.
Summary
What happened
Denial of service in Esoteric YamlBeans 1.15 and earlier allows attackers to interrupt applications with crafted YAML input. YamlReader accepts recursively nested anchor aliases without an expansion limit, creating a data graph whose traversal multiplies work. An application must read attacker-controlled YAML and then recursively traverse or stringify the result, consuming CPU and memory until it hangs or raises a Java OutOfMemoryError.
The record
- CVE
- CVE-2023-24620
- Published
- Aug 25, 2023
- Updated
- Oct 2, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-611, T1499.004
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 25, 2023CVE publishedPublication date reported by the CVE source.
- Oct 2, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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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
- YamlBeans anchor-expansion proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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