CVE-2009-4134

CVE-2009-4134 describes a buffer underflow vulnerability in the rgbimg module of Python 2.5. This flaw allows remote attackers to trigger a denial of service by providing a specially crafted black-and-white RGB image with a large ZSIZE value, leading to an application crash due to an invalid pointer dereference. The vulnerability has a CVSS score of 5.0, indicating a medium severity, and can be exploited with low attack complexity over the network, resulting in a denial of service. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.