Description
YAML::Syck versions before 1.36 for Perl has missing null-terminators which causes out-of-bounds read and potential information disclosure Missing null terminators in token.c leads to but-of-bounds read which allows adjacent variable to be read The issue is seen with complex YAML files with a hash of all keys and empty values. There is no indication that the issue leads to accessing memory outside that allocated to the module.
Problem types
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
Product status
Any version before 1.36
References
github.com/cpan-authors/YAML-Syck/pull/65
metacpan.org/dist/YAML-Syck/changes
