summary: Multiple remotely-triggered denials of service
discoveredBy: Daniel Atallah
It has been discovered that eight denial of service conditions exist in
libpurple all due to insufficient validation of the return value from
`purple_base64_decode()`. Invalid or malformed data received in place of a valid
base64-encoded value in portions of the Yahoo!, MSN, MySpaceIM, and XMPP
protocol plugins and the NTLM authentication support trigger a crash. These
vulnerabilities can be leveraged by a remote user for denial of service.
Check the return value from `purple_base64_decode()` before trying to use it.