This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page.
View CVE-2017-20285 →
UBUNTU-CVE-2017-20285
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 in...
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Ubuntu:Pro:16.04:LTS
libyaml-perl
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.15-1ubuntu0.1~esm1"}]}]
Ubuntu:Pro:18.04:LTS
libyaml-perl
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.24-1ubuntu0.1~esm1"}]}]
References
- advisory ubuntu.com
- report ubuntu.com
- report cve.org
- report openwall.com
- report blogs.perl.org