Use After Free in Cisco iOS Xe
CVE-2018-0170
A vulnerability in the Cisco Umbrella Integration feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition, related to the OpenDNS software. The vulnerability is due to a logic error that exists when handling a malformed incoming packet, leading to access to an internal data structure after it has been freed. An attacker could exploit this vulnerability by sending crafted, malformed IP packets to an affected device. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCvb86327.
Vulnerability class: Use-After-Free
EPSS: 0.027 (84.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Cisco Ios_xe — versions 16.4.1
- N/a Cisco Ios Xe — versions Cisco IOS XE
Weakness classification (CWE)
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_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-0170?
- CVE-2018-0170 is a high-severity vulnerability in Cisco iOS Xe, classified under Use After Free. CVSS score: 7.5/10. Published 2018-03-28.
- How severe is CVE-2018-0170?
- High severity. CVSS v3 base score is 7.5 out of 10.