Cisco ASA/Firepower Threat Defense Cryptographic Driver SSL Packet resource consumption
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CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
7.1 | $0-$5k | 0.00 |
A vulnerability classified as problematic was found in Cisco ASA and Firepower Threat Defense (Firewall Software) (the affected version is unknown). Affected by this vulnerability is an unknown code of the component Cryptographic Driver. The manipulation as part of a SSL Packet leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:
A vulnerability in the cryptographic driver for Cisco Adaptive Security Appliance Software (ASA) and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reboot unexpectedly. The vulnerability is due to incomplete input validation of a Secure Sockets Layer (SSL) or Transport Layer Security (TLS) ingress packet header. An attacker could exploit this vulnerability by sending a crafted TLS/SSL packet to an interface on the targeted device. An exploit could allow the attacker to cause the device to reload, which will result in a denial of service (DoS) condition. Note: Only traffic directed to the affected system can be used to exploit this vulnerability. This vulnerability affects systems configured in routed and transparent firewall mode and in single or multiple context mode. This vulnerability can be triggered by IPv4 and IPv6 traffic. A valid SSL or TLS session is required to exploit this vulnerability.
The weakness was released 07/10/2019 as cisco-sa-20190710-asa-ftd-dos as confirmed advisory (Website). The advisory is shared at tools.cisco.com. This vulnerability is known as CVE-2019-1873 since 12/06/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.
Upgrading eliminates this vulnerability.
Entries connected to this vulnerability are available at VDB-213288, VDB-213292, VDB-213293 and VDB-213303.
Product
Type
Vendor
Name
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 7.1VulDB Meta Temp Score: 7.1
VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 7.5
NVD Vector: 🔍
CNA Base Score: 8.6
CNA Vector (Cisco Systems, Inc.): 🔍
CVSSv2
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Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Resource consumptionCWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Timeline
12/06/2018 🔍07/10/2019 🔍
07/11/2019 🔍
10/24/2023 🔍
Sources
Vendor: cisco.comAdvisory: cisco-sa-20190710-asa-ftd-dos
Status: Confirmed
CVE: CVE-2019-1873 (🔍)
SecurityFocus: 109123
See also: 🔍
Entry
Created: 07/11/2019 12:41Updated: 10/24/2023 14:13
Changes: 07/11/2019 12:41 (40), 07/03/2020 19:01 (18), 10/24/2023 14:10 (4), 10/24/2023 14:13 (12)
Complete: 🔍
Cache ID: 18:E07:103
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