VDB-131088 · CVE-2019-1691 · BID 107099

Cisco Firepower Threat Defense up to 6.2.3.3 Snort Detection Engine Packet input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.6$0-$5k0.00

A vulnerability, which was classified as problematic, was found in Cisco Firepower Threat Defense up to 6.2.3.3 (Firewall Software). Affected is some unknown processing of the component Snort Detection Engine. The manipulation as part of a Packet leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. CVE summarizes:

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.

The bug was discovered 02/20/2019. The weakness was presented 02/21/2019 as cisco-sa-20190220-fpwr-ssltls- as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability is traded as CVE-2019-1691 since 12/06/2018. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k.

Upgrading to version 6.2.3.4 eliminates this vulnerability.

Productinfo

Type

Vendor

Name

Version

License

Support

  • end of life (old version)

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.6

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.8
NVD Vector: 🔍

CNA Base Score: 5.8
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Firepower Threat Defense 6.2.3.4

Timelineinfo

12/06/2018 🔍
02/20/2019 +76 days 🔍
02/21/2019 +1 days 🔍
02/22/2019 +1 days 🔍
07/19/2023 +1608 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20190220-fpwr-ssltls-
Status: Confirmed

CVE: CVE-2019-1691 (🔍)
SecurityFocus: 107099

Entryinfo

Created: 02/22/2019 06:55
Updated: 07/19/2023 07:57
Changes: 02/22/2019 06:55 (61), 05/12/2020 07:54 (1), 07/19/2023 07:50 (4), 07/19/2023 07:57 (12)
Complete: 🔍

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