The remote Debian host is missing a security-related update.
It was discovered that OpenAFS, the implementation of the distributed filesystem AFS, contained several flaws that could result in information leak, denial-of-service or kernel panic.
Upgrade the openafs packages. For the oldstable distribution (wheezy), these problems have been fixed in version 1.6.1-3+deb7u3. For the stable distribution (jessie), these problems have been fixed in version 1.6.9-2+deb8u3.