Buffer overflow in the MSN protocol plugins (1) object.c and (2) slp.c for Gaim before 0.82 allows remote attackers to cause a denial of service and possibly execute arbitrary code via MSNSLP protocol messages that are not properly handled in a strncpy call.

Multiple buffer overflows in Gaim 0.75 allow remote attackers to cause a denial of service and possibly execute arbitrary code via (1) octal encoding in yahoo_decode that causes a null byte to be written beyond the buffer, (2) octal encoding in yahoo_decode that causes a pointer to reference memory beyond the terminating null byte, (3) a quoted printable string to the gaim_quotedp_decode MIME decoder that causes a null byte to be written beyond the buffer, and (4) quoted printable encoding in gaim_quotedp_decode that causes a pointer to reference memory beyond the terminating null byte.

Multiple buffer overflows in Gaim 0.75 and earlier, and Ultramagnetic before 0.81, allow remote attackers to cause a denial of service and possibly execute arbitrary code via (1) cookies in a Yahoo web connection, (2) a long name parameter in the Yahoo login web page, (3) a long value parameter in the Yahoo login page, (4) a YMSG packet, (5) the URL parser, and (6) HTTP proxy connect.

Buffer overflow in the Extract Info Field Function for (1) MSN and (2) YMSG protocol handlers in Gaim 0.74 and earlier, and Ultramagnetic before 0.81, allows remote attackers to cause a denial of service and possibly execute arbitrary code.

Integer overflow in Gaim 0.74 and earlier, and Ultramagnetic before 0.81, allows remote attackers to cause a denial of service and possibly execute arbitrary code via a directIM packet that triggers a heap-based buffer overflow.

decrypt_msg for the Gaim-Encryption GAIM plugin 1.15 and earlier does not properly validate a message length parameter, which allows remote attackers to cause a denial of service (crash) via a negative length, which overwrites arbitrary heap memory with a zero byte.

Buffer overflow in Jabber plug-in for Gaim client before 0.58 allows remote attackers to execute arbitrary code.

The URL handler in the manual browser option for Gaim before 0.59.1 allows remote attackers to execute arbitrary script via shell metacharacters in a link.

Gaim 0.57 stores sensitive information in world-readable and group-writable files in the /tmp directory, which allows local users to access MSN web email accounts of other users who run Gaim by reading authentication information from the files.

Buffer overflow in Gaim 0.10.3 and earlier using the OSCAR protocol allows remote attackers to conduct a denial of service and possibly execute arbitrary commands via a long HTML tag.