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OpenSSL 1.0.2 < 1.0.2j Multiple DoS

Medium

Synopsis

The remote web server is running an outdated instance of OpenSSL and that is affected by multiple Denial of Service (DoS) vulnerabilities.

Description

According to its banner, the version of OpenSSL on the remote host is 1.0.2 prior to 1.0.2j and is affected by multiple DoS vulnerabilities :

- A flaw exists in the CRL functionality that is triggered when handling a certificate revocation list (CRL). With a specially crafted CRL, a context-dependent attacker can cause the service to crash due to a NULL pointer being dereferenced. (CVE-2016-7052) - 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 1.0.2j or higher.