The remote Debian host is missing a security-related update.
It was discovered that NSPR, Netscape Portable Runtime library, could crash an application using the library when parsing a certificate that causes an integer overflow. This flaw only affects 64-bit systems.
Upgrade the nspr packages. For the oldstable distribution (squeeze), this problem has been fixed in version 4.8.6-1+squeeze1. For the stable distribution (wheezy), this problem has been fixed in version 2:4.9.2-1+deb7u1.