SynopsisThe remote web server is running an outdated instance of OpenSSL and is affected by multiple attack vectors.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 1.1.0d and is affected by multiple vulnerabilities :
- A NULL pointer dereference flaw exists in 'ssl/statem/statem_clnt.c' that is triggered during the handling of parameters for the DHE or ECDHE key exchanges. This may allow a remote attacker to crash a process linked against the library. (CVE-2017-3730)
- An out-of-bounds read flaw exists in 'crypto/evp/e_chacha20_poly1305.c' that is triggered during the handling of packets when using the CHACHA20/POLY1305 cipher. This may allow a remote attacker to crash a process linked against the library. (CVE-2017-3731)
- A carry propagating flaw exists in the Montgomery squaring procedure in 'crypto/bn/asm/x86_64-mont5.pl'. This may cause 'BN_mod_exp' to produce incorrect results, which may potentially allow an attacker to derive information regarding private keys. (CVE-2017-3732)
SolutionUpgrade OpenSSL to version 1.1.0d or higher