CVE-2019-25777
Description
AI Translation Available
YAML versions before 1.27_001 for Perl allow a loaded perl/glob document to replace any package variable, which can lead to arbitrary code execution.
A perl/glob document names a package and a symbol, and supplies the value assigned to it. Nothing restricts the name, so the target can be @INC or YAML's own load options.
A perl/glob document that sets $YAML::LoadCode or $YAML::UseCode turns on code loading, which is off by default, for every later Load() in the process. A perl/code document is then passed to a string eval, so an attacker who supplies two documents to separate Load() calls in one process can execute arbitrary Perl code.
502
Deserialization of Untrusted Data
DraftCommon Consequences
Security Scopes Affected:
Integrity
Availability
Other
Potential Impacts:
Modify Application Data
Unexpected State
Dos: Resource Consumption (Cpu)
Varies By Context
Applicable Platforms
Languages:
Java, Ruby, PHP, Python, JavaScript
Technologies:
Not Technology-Specific, ICS/OT, AI/ML
914
Improper Control of Dynamically-Identified Variables
IncompleteCommon Consequences
Security Scopes Affected:
Integrity
Other
Potential Impacts:
Modify Application Data
Execute Unauthorized Code Or Commands
Varies By Context
Alter Execution Logic
Applicable Platforms
Languages:
Not Language-Specific, Interpreted
https://github.com/ingydotnet/yaml-pm/commit/bace96b5e6661d521c7c515c94a09e081c…
https://github.com/ingydotnet/yaml-pm/issues/212
https://metacpan.org/release/TINITA/YAML-1.28/changes