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.

Published: Dec 12, 2019
Updated: May 22, 2023
CVE: CVE-2017-18640
GHSA: GHSA-rvwf-54qp-4r6v
Severity: High
Exploit:

CVSS v3:

Severity: High
Score: 7.5
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2:

Severity: Medium
Score: 5
AV:N/AC:L/Au:N/C:N/I:N/A:P

CWEs:

CWE-776

OWASP TOP 10:

A4 - XML External Entities (XXE)

Affected Software
References

Software	From	Fixed in
snakeyaml_project / snakeyaml	-	1.26
fedoraproject / fedora	31	31.x
fedoraproject / fedora	32	32.x
quarkus / quarkus	-	1.3.4.x
oracle / peoplesoft_enterprise_pt_peopletools	8.56	8.56.x
oracle / peoplesoft_enterprise_pt_peopletools	8.57	8.57.x
oracle / peoplesoft_enterprise_pt_peopletools	8.58	8.58.x
org.yaml / snakeyaml	-	1.26

https://bitbucket.org/asomov/snakeyaml/commits/da11ddbd91c1f8392ea932b37fa48110fa54ed8c
https://bitbucket.org/asomov/snakeyaml/issues/377/allow-configuration-for-preventing-billion
https://bitbucket.org/asomov/snakeyaml/wiki/Billion%20laughs%20attack
https://bitbucket.org/asomov/snakeyaml/wiki/Changes
https://bitbucket.org/snakeyaml/snakeyaml/issues/377
https://bitbucket.org/snakeyaml/snakeyaml/wiki/Changes
https://lists.apache.org/thread.html/r1058e7646988394de6a3fd0857ea9b1ee0de14d7bb28fee5ff782457@%3Ccommits.atlas.apache.org%3E
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https://mvnrepository.com/artifact/org.yaml/snakeyaml/1.25/usages
https://security.gentoo.org/glsa/202305-28
https://www.oracle.com/security-alerts/cpuApr2021.html

Vulnerability Database

CVE-2017-18640

Deep Security Visibility Without the Complexity