CVE-2023-24620

low-risk
Published 2023-08-25

An issue was discovered in Esoteric YamlBeans through 1.15. A crafted YAML document is able perform am XML Entity Expansion attack against YamlBeans YamlReader. By exploiting the Anchor feature in YAML, it is possible to generate a small YAML document that, when read, is expanded to a large size, causing CPU and memory consumption, such as a Java Out-of-Memory exception.

Do I need to act?

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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Yamlbeans

Affected Vendors

Esotericsoftware

References (6)

Third Party Advisory https://contrastsecurity.com
Exploit https://github.com/Contrast-Security-OSS/yamlbeans/blob/main/SECURITY.md
Third Party Advisory https://github.com/EsotericSoftware
Third Party Advisory https://contrastsecurity.com
Exploit https://github.com/Contrast-Security-OSS/yamlbeans/blob/main/SECURITY.md
Third Party Advisory https://github.com/EsotericSoftware
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal