Hiroshi Shirosaki

**Name of the Vulnerable Software and Affected Versions** Ruby versions 1.9.3, 2.0.0, and 2.1 **Description** The issue allows context-dependent attackers to cause a denial of service, resulting in a segmentation fault and crash, by utilizing a long string in the `str buf cat` function. **Recommendations** For Ruby version 1.9.3, update to a version that fixes the issue in the `str buf cat` function. For Ruby version 2.0.0, update to a version that fixes the issue in the `str buf cat` function. For Ruby version 2.1, update to a version that fixes the issue in the `str buf cat` function.