Vulnerability in Cisco Adaptive Security Appliance Software
CVE-2018-15397
A vulnerability in the implementation of Traffic Flow Confidentiality (TFC) over IPsec functionality in 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 restart unexpectedly, resulting in a denial of service (DoS) condition. The vulnerability is due to an error that may occur if the affected software renegotiates the encryption key for an IPsec tunnel when certain TFC traffic is in flight. An attacker could exploit this vulnerability by sending a malicious stream of TFC traffic through an established IPsec tunnel on an affected device. A successful exploit could allow the attacker to cause a daemon process on the affected device to crash, which could cause the device to crash and result in a DoS condition.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.012 (66.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
- Cisco Adaptive Security Appliance Software — versions 9.8.2, 9.6.4, 9.9.1\(1\)
- Cisco Adaptive Security Appliance (Asa) Software
- Cisco Secure Firewall Management Center — versions 6.2.2
Weakness classification (CWE)
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003… (vendor-advisory, Vendor Advisory)
- www.securitytracker.com/id/1041786 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2018-15397?
- CVE-2018-15397 is a medium-severity vulnerability in Cisco Adaptive Security Appliance Software, classified under CWE-320. CVSS score: 6.8/10. Published 2018-10-05.
- How severe is CVE-2018-15397?
- Medium severity. CVSS v3 base score is 6.8 out of 10.