XXE in Esotericsoftware Yamlbeans
CVE-2023-24620
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.
Vulnerability class: XXE (XML External Entity)
EPSS: 0.004 (28.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Affected products
- Esotericsoftware Yamlbeans
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-24620?
- CVE-2023-24620 is a medium-severity vulnerability in Esotericsoftware Yamlbeans, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 5.5/10. Published 2023-08-25.
- How severe is CVE-2023-24620?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2023-24620 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.