Medium severity · published Aug 25, 2023
CVE-2023-24620
An issue was discovered in Esoteric YamlBeans through 1.15
5.5
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
YA
Yamlbeans · Esotericsoftware
through 1.15 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-24620
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-24620
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
More from Yamlbeans
7.8
CVE-2023-24621
An issue was discovered in Esoteric YamlBeans through 1.15