First published: Wed Feb 20 2019(Updated: )
A vulnerability in the detection engine of Cisco Firepower Threat Defense Software could allow an unauthenticated, remote attacker to cause the unexpected restart of the SNORT detection engine, resulting in a denial of service (DoS) condition. The vulnerability is due to the incomplete error handling of the SSL or TLS packet header during the connection establishment. An attacker could exploit this vulnerability by sending a crafted SSL or TLS packet during the connection handshake. An exploit could allow the attacker to cause the SNORT detection engine to unexpectedly restart, resulting in a partial DoS condition while the detection engine restarts. Versions prior to 6.2.3.4 are affected.
Credit: ykramarz@cisco.com ykramarz@cisco.com
Affected Software | Affected Version | How to fix |
---|---|---|
Cisco Firepower Threat Defense | <6.2.3.4 | |
<6.2.3.4 |
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CVE-2019-1691 has a high severity rating due to its potential to cause a denial of service.
To mitigate CVE-2019-1691, upgrade Cisco Firepower Threat Defense Software to the latest version beyond 6.2.3.4.
CVE-2019-1691 is caused by an issue in the detection engine of Cisco Firepower Threat Defense Software.
CVE-2019-1691 affects users of Cisco Firepower Threat Defense Software versions below 6.2.3.4.
The main risk associated with CVE-2019-1691 is a denial of service condition due to the unexpected restart of the SNORT detection engine.