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CVE-2017-20285 Details

Description

YAML versions before 1.30 for Perl allow a loaded document to trigger the DESTROY method of arbitrary classes. A perl/hash:Class tag blesses a hash into the class it names. The document supplies the object's fields, and Perl calls DESTROY when it goes out of scope. What DESTROY does depends on the classes the process has loaded. With File::Temp::Dir from core Perl, it can delete a directory tree the document names.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/ingydotnet/yaml-pm/commit/471314bbdcbd62077eea32755929122aa8bd00a3.patch	CPANSec
https://github.com/ingydotnet/yaml-pm/commit/7736f38bd02e4f9f77d5468721e3be3d7b34a8ec.patch	CPANSec
https://github.com/ingydotnet/yaml-pm/issues/176	CPANSec
https://metacpan.org/release/TINITA/YAML-1.30/changes	CPANSec
http://www.openwall.com/lists/oss-security/2026/10/05/8	CVE

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-470	Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')	CPANSec
CWE-502	Deserialization of Untrusted Data	CPANSec

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 5, 2026	CVE Modified	CVE
Oct 5, 2026	New CVE Received	CPANSec