Improper input validation in Cisco Adaptive Security Appliance Software

CVE-2018-15454

A vulnerability in the Session Initiation Protocol (SIP) inspection engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload or trigger high CPU, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of SIP traffic. An attacker could exploit this vulnerability by sending SIP requests designed to specifically trigger this issue at a high rate across an affected device. Software updates that address this vulnerability are not yet available.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.044 (90.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

  • psirt@cisco.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
  • psirt@cisco.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK)
  • psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2018-15454?
CVE-2018-15454 is a high-severity vulnerability in Cisco Adaptive Security Appliance Software, classified under Improper Input Validation. CVSS score: 8.6/10. Published 2018-11-01.
How severe is CVE-2018-15454?
High severity. CVSS v3 base score is 8.6 out of 10.
Is CVE-2018-15454 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.