CVE-2019-1691
published 2019-02-21CVE-2019-1691: A vulnerability in the detection engine of Cisco Firepower Threat Defense Software could allow an unauthenticated, remote attacker to cause the unexpected…
PriorityP431medium5.8CVSS 3.1
AVNACLPRNUINSCCNINAL
EPSS
2.27%
82.9th percentile
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.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | cisco_firepower_threat_defense_software | >= unspecified < 6.2.3.4 | 6.2.3.4 |
| cisco | firepower_threat_defense | — | — |
| cisco | secure_firewall_threat_defense | < 6.2.3.4 | 6.2.3.4 |
CVSS provenance
nvdv3.15.8MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
nvdv3.05.8MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
vendor_cisco5.8MEDIUM
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Cisco
Cisco Firepower Threat Defense Software SSL or TLS Denial of Service Vulnerability
vendor_cisco·2019-02-20·CVSS 5.8
CVE-2019-1691 [MEDIUM] CWE-20 Cisco Firepower Threat Defense Software SSL or TLS Denial of Service Vulnerability
Cisco Firepower Threat Defense Software SSL or TLS Denial of Service Vulnerability
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.
There are no workarounds that address this vulnerability.
Cisco
Cisco Firepower Threat Defense Software SSL or TLS Denial of Service Vulnerability
vendor_cisco·CVSS 3.0
CVE-2019-1691 Cisco Firepower Threat Defense Software SSL or TLS Denial of Service Vulnerability
CVE-2019-1691: Cisco Firepower Threat Defense Software SSL or TLS Denial of Service Vulnerability
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. There are no
CVSS: 3.0
CWE: CWE-20, CWE-20
VulDB
Cisco Firepower Threat Defense up to 6.2.3.3 Snort Detection Engine Packet input validation (cisco-sa-20190220-fpwr-ssltls- / BID-107099)
vuldb·2026-08-12·CVSS 5.8
CVE-2019-1691 [MEDIUM] Cisco Firepower Threat Defense up to 6.2.3.3 Snort Detection Engine Packet input validation (cisco-sa-20190220-fpwr-ssltls- / BID-107099)
A vulnerability was found in Cisco Firepower Threat Defense up to 6.2.3.3. It has been classified as problematic. Affected by this vulnerability is an unknown functionality of the component Snort Detection Engine. The manipulation as part of Packet leads to improper input validation.
This vulnerability is uniquely identified as CVE-2019-1691. The attack is possible to be carried out remotely. No exploit exists.
Upgrading the affected component is recommended.
GHSA
GHSA-95q2-c52x-vr4p: A vulnerability in the detection engine of Cisco Firepower Threat Defense Software could allow an unauthenticated, remote attacker to cause the unexpe
ghsa_unreviewed·2022-05-13
CVE-2019-1691 [MEDIUM] CWE-755 GHSA-95q2-c52x-vr4p: A vulnerability in the detection engine of Cisco Firepower Threat Defense Software could allow an unauthenticated, remote attacker to cause the unexpe
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2019-02-21
Published