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OpenSSL 1.1.0 < 1.1.0b Multiple Vulnerabilities

Synopsis

The remote web server is running an outdated instance of OpenSSL and that is affected by multiple vulnerabilities.

Description

According to its banner, the version of OpenSSL on the remote host is version 1.1.0 prior to 1.1.0b and is affected by multiple vulnerabilities :

- A flaw exists in the 'read_state_machine()' function of 'ssl/statem/statem.c'. The issue is triggered when handling messages larger than ~ 16k. With a specially crafted message, a remote attacker can trigger a use-after-free leading to a denial of service or potentially remote code execution. (CVE-2016-6309) - A flaw exists that is triggered when handling many consecutive 'SSL3_AL_WARNING' undefined alerts. By continuously sending warning alerts, a remote attacker can cause a process linked against the library to exhaust available CPU resources and potentially stop responding. (CVE-2016-8610)

Solution

Upgrade OpenSSL to version 1.1.0b or higher