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LibYAML input sanitization errors

Description:

oCERT reports:

The LibYAML project is an open source YAML 1.1 parser and emitter written in C.

The library is affected by a heap-based buffer overflow which can lead to arbitrary code execution. The vulnerability is caused by lack of proper expansion for the string passed to the yaml_parser_scan_uri_escapes() function.

A specially crafted YAML file, with a long sequence of percent-encoded characters in a URL, can be used to trigger the overflow.

References:

Affects:

portaudit: LibYAML input sanitization errors

Disclaimer: The data contained on this page is derived from the VuXML document, please refer to the the original document for copyright information. The author of portaudit makes no claim of authorship or ownership of any of the information contained herein.

If you have found a vulnerability in a FreeBSD port not listed in the database, please contact the FreeBSD Security Team. Refer to "FreeBSD Security Information" for more information.


Oliver Eikemeier <eik@FreeBSD.org>