SynopsisThe remote web server is running an outdated instance of OpenSSL and is affected by multiple attack vectors.
DescriptionAccording to its banner, the version of OpenSSL on the remote host is version 1.1.0 prior to 1.1.0c and is affected by multiple vulnerabilities :
- A NULL pointer dereference flaw exists in the 'asn1_item_embed_d2i()' function in 'crypto/asn1/tasn_dec.c' that is triggered when handling the ASN.1 CHOICE type. This may allow a remote attacker to crash a process linked against the library. (CVE-2016-7053)
- An overflow condition exists in the 'chacha20_poly1305_cipher()' function in 'crypto/evp/e_chacha20_poly1305.c' that is triggered when handling TLS connections using *-CHACHA20-POLY1305 ciphersuites. This may allow a remote attacker to cause a heap-based buffer overflow and crash a process linked against the library. (CVE-2016-7054)
- A carry propagating flaw exists in the Broadwell-specific Montgomery multiplication procedure that leads to incorrect results. This may result in transient authentication and key negotiation failures, reproducible erroneous outcomes of public-key operations, or potentially attacks against ECDH key negotiation in very atypical cases. (CVE-2016-7055)
SolutionUpgrade OpenSSL to version 1.1.0c or higher