In Memcached before 1.6.22, a buffer overflow exists when processing multiget requests in proxy mode, if there are many spaces after the "get" substring.
https://github.com/memcached/memcached/compare/1.6.21...1.6.22
https://github.com/memcached/memcached/commit/76a6c363c18cfe7b6a1524ae64202ac9db330767