The remote host is missing an update to git-core announced via advisory DSA 1841-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201841-1

It was discovered that git-daemon which is part of git-core, a popular distributed revision control system, is vulnerable to denial of service attacks caused by a programming mistake in handling requests containing extra unrecognized arguments which results in an infinite loop. While this is no problem for the daemon itself as every request will spawn a new git-daemon instance, this still results in a very high CPU consumption and might lead to denial of service conditions. For the oldstable distribution (etch), this problem has been fixed in version 1.4.4.4-4+etch3. For the stable distribution (lenny), this problem has been fixed in version 1.5.6.5-3+lenny2. For the testing distribution (squeeze), this problem has been fixed in version 1:1.6.3.3-1. For the unstable distribution (sid), this problem has been fixed in version 1:1.6.3.3-1. We recommend that you upgrade your git-core packages.