[jira] [Created] (THRIFT-6028) Harden Perl protocol negative sizes

["Jens Geyer (Jira)" <ji...@apache.org>]

Jens Geyer created THRIFT-6028:
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             Summary: Harden Perl protocol negative sizes
                 Key: THRIFT-6028
                 URL: https://issues.apache.org/jira/browse/THRIFT-6028
             Project: Thrift
          Issue Type: Bug
          Components: Perl - Library
            Reporter: Jens Geyer


The Perl library does not validate negative sizes when reading Thrift payloads.

Size values appear in binary/string fields and in map/list/set headers. Those values must be non-negative. In the current Perl implementation, a malformed payload can declare a negative size and the value is passed directly to the transport read path without rejection.

This is a protocol hardening gap compared with other runtimes such as C++, Java, Python, Go, and Node.js, which all raise a NEGATIVE_SIZE exception.

The fix should add negative-size checks in:
- {{TBinaryProtocol::readListBegin}}
- {{TBinaryProtocol::readMapBegin}}
- {{TBinaryProtocol::readSetBegin}}
- {{TBinaryProtocol::readString}} / {{readStringBody}}

See THRIFT-6025 for the equivalent Ruby fix.



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