CVE-2010-3493

Múltiples condiciones de carrera en smtpd.py en el módulo smtpd in Python v2.6, v2.7, v3.1 y v3.2 alpha permite a atacantes remotos provocar una denegación de servicio (agotamiento de demonio)por establecimiento e inmediatamente cerrando una conexión TCP, llevando la función accept a devolver un valor inesperado de None, un valor inesperado de None para la dirección, o un error ECONNABORTED, EAGAIN, o EWOULDBLOCK, o la función getpeername teniendo un error ENOTCONN, tema relacionado con CVE-2010-3492.

Buffer underflow in the rgbimg module in Python 2.5 allows remote attackers to cause a denial of service via a large ZSIZE value in a black-and-white RGB image that triggers an invalid pointer dereference. Integer overflow in rgbimgmodule.c in the rgbimg module in Python 2.5 allows remote attackers to have an unspecified impact via a large image that triggers a buffer overflow. Multiple buffer overflows in the RLE decoder in the rgbimg module in Python 2.5 allow remote attackers to have an unspecified impact via an image file containing crafted data that triggers improper processing within the expandrow function. The asyncore module in Python before 3.2 does not properly handle unsuccessful calls to the accept function, and does not have accompanying documentation describing how daemon applications should handle unsuccessful calls to the accept function, which makes it easier for remote attackers to conduct denial of service attacks that terminate these applications via network connections. Multiple race conditions in smtpd.py in the smtpd module in Python 2.6, 2.7, 3.1, and 3.2 alpha allow remote attackers to cause a denial of service by establishing and then immediately closing a TCP connection, leading to the accept function having an unexpected return value of None, an unexpected value of None for the address, or an ECONNABORTED, EAGAIN, or EWOULDBLOCK error, or the getpeername function having an ENOTCONN error, a related issue to CVE-2010-3492.