The remote Debian host is missing a security-related update.
Several vulnerabilities were discovered in OpenSSL : - CVE-2016-2177 Guido Vranken discovered that OpenSSL uses undefined pointer arithmetic. Additional information can be found at https://www.openssl.org/blog/blog/2016/06/27/undefined-p ointer-arithmetic/ - CVE-2016-2178 Cesar Pereida, Billy Brumley and Yuval Yarom discovered a timing leak in the DSA code. - CVE-2016-2179 / CVE-2016-2181 Quan Luo and the OCAP audit team discovered denial of service vulnerabilities in DTLS. - CVE-2016-2180 / CVE-2016-2182 / CVE-2016-6303 Shi Lei discovered an out-of-bounds memory read in TS_OBJ_print_bio() and an out-of-bounds write in BN_bn2dec() and MDC2_Update(). - CVE-2016-2183 DES-based cipher suites are demoted from the HIGH group to MEDIUM as a mitigation for the SWEET32 attack. - CVE-2016-6302 Shi Lei discovered that the use of SHA512 in TLS session tickets is susceptible to denial of service. - CVE-2016-6304 Shi Lei discovered that excessively large OCSP status request may result in denial of service via memory exhaustion. - CVE-2016-6306 Shi Lei discovered that missing message length validation when parsing certificates may potentially result in denial of service.
Upgrade the openssl packages. For the stable distribution (jessie), these problems have been fixed in version 1.0.1t-1+deb8u4.