CVE-2017-18640
HIGHCVSS 7.5/10EPSS 26.72%
Last modified
CVE-2017-18640 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The Alias feature in SnakeYAML before 1.26 allows entity expansion during a load operation, a related issue to CVE-2003-1564.. EPSS estimates a 26.72% chance of exploitation in the next 30 days.
Description
The Alias feature in SnakeYAML before 1.26 allows entity expansion during a load operation, a related issue to CVE-2003-1564.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Snakeyaml Project | Snakeyaml | < 1.26 |
| Fedoraproject | Fedora | 31 |
| Fedoraproject | Fedora | 32 |
| Quarkus | Quarkus | <= 1.3.4 |
| Oracle | Peoplesoft Enterprise Pt Peopletools | 8.56 |
| Oracle | Peoplesoft Enterprise Pt Peopletools | 8.57 |
| Oracle | Peoplesoft Enterprise Pt Peopletools | 8.58 |
References
- https://bitbucket.org/asomov/snakeyaml/issues/377/allow-configuration-for-preventing-billionExploit, Issue Tracking, Patch, Third Party Advisory
- https://bitbucket.org/asomov/snakeyaml/wiki/Billion%20laughs%20attackThird Party Advisory
- https://bitbucket.org/snakeyaml/snakeyaml/issues/377Exploit, Issue Tracking, Third Party Advisory
- https://bitbucket.org/snakeyaml/snakeyaml/wiki/ChangesRelease Notes, Third Party Advisory
- https://mvnrepository.com/artifact/org.yaml/snakeyaml/1.25/usagesThird Party Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
- https://bitbucket.org/asomov/snakeyaml/issues/377/allow-configuration-for-preventing-billionExploit, Issue Tracking, Patch, Third Party Advisory
- https://bitbucket.org/asomov/snakeyaml/wiki/Billion%20laughs%20attackThird Party Advisory
- https://bitbucket.org/snakeyaml/snakeyaml/issues/377Exploit, Issue Tracking, Third Party Advisory
- https://bitbucket.org/snakeyaml/snakeyaml/wiki/ChangesRelease Notes, Third Party Advisory
- https://mvnrepository.com/artifact/org.yaml/snakeyaml/1.25/usagesThird Party Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2017-18640?
The Alias feature in SnakeYAML before 1.26 allows entity expansion during a load operation, a related issue to CVE-2003-1564.
How severe is CVE-2017-18640?
CVE-2017-18640 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 26.72% probability of exploitation in the next 30 days.
How do I fix CVE-2017-18640?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2017-18640?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST