CVE-2019-1873

Summary

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.

Affected Software

VendorProductVersion RangeStatus
CiscoCisco Adaptive Security Appliance (ASA) Softwareunspecified < 9.4.4.36affected
CiscoCisco Adaptive Security Appliance (ASA) Softwareunspecified < 9.6.4.29affected
CiscoCisco Adaptive Security Appliance (ASA) Softwareunspecified < 9.8.4.3affected
CiscoCisco Adaptive Security Appliance (ASA) Softwareunspecified < 9.9.2.52affected
CiscoCisco Adaptive Security Appliance (ASA) Softwareunspecified < 9.10.1.22affected
CiscoCisco Adaptive Security Appliance (ASA) Softwareunspecified < 9.12.2affected

Weaknesses

  • CWE-400: CWE-400

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References