Improper input validation in Cisco Asr 5000
CVE-2018-0117
A vulnerability in the ingress packet processing functionality of the Cisco Virtualized Packet Core-Distributed Instance (VPC-DI) Software could allow an unauthenticated, remote attacker to cause both control function (CF) instances on an affected system to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient handling of user-supplied data by the affected software. An attacker could exploit this vulnerability by sending malicious traffic to the internal distributed instance (DI) network address on an affected system. A successful exploit could allow the attacker to cause an unhandled error condition on the affected system, which would cause the CF instances to reload and consequently cause the entire VPC to reload, resulting in the disconnection of all subscribers and a DoS condition on the affected system. This vulnerability affects Cisco Virtualized Packet Core-Distributed Instance (VPC-DI) Software N4.0 through N5.5 with the Cisco StarOS operating system 19.2 through 21.3. Cisco Bug IDs: CSCve17656.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.017 (77.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.017 · change: +0.001
Affected products
- Cisco Asr 5000
- Cisco Asr 5000 Firmware — versions 21.1.v0.66836, 21.1.v7, 21.3.0
- Cisco Asr 5500
- Cisco Asr 5500 Firmware — versions 21.1.v0.66836, 21.1.v7, 21.3.0
- Cisco Virtualized Packet Core-Distributed Instance — versions Cisco Virtualized Packet Core-Distributed Instance
Weakness classification (CWE)
References
- www.securityfocus.com/bid/102970 (VDB Entry, Third Party Advisory, vdb-entry)
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180207… (Vendor Advisory)
Frequently asked questions
- What is CVE-2018-0117?
- CVE-2018-0117 is a high-severity vulnerability in Cisco Asr 5000, classified under Improper Input Validation. CVSS score: 8.6/10. Published 2018-02-08.
- How severe is CVE-2018-0117?
- High severity. CVSS v3 base score is 8.6 out of 10.