Improper input validation in Cisco Asr 9001
CVE-2018-0136
A vulnerability in the IPv6 subsystem of Cisco IOS XR Software Release 5.3.4 for the Cisco Aggregation Services Router (ASR) 9000 Series could allow an unauthenticated, remote attacker to trigger a reload of one or more Trident-based line cards, resulting in a denial of service (DoS) condition. The vulnerability is due to incorrect handling of IPv6 packets with a fragment header extension. An attacker could exploit this vulnerability by sending IPv6 packets designed to trigger the issue either to or through the Trident-based line card. A successful exploit could allow the attacker to trigger a reload of Trident-based line cards, resulting in a DoS during the period of time the line card takes to restart. This vulnerability affects Cisco Aggregation Services Router (ASR) 9000 Series when the following conditions are met: The router is running Cisco IOS XR Software Release 5.3.4, and the router has installed Trident-based line cards that have IPv6 configured. A software maintenance upgrade (SMU) has been made available that addresses this vulnerability. The fix has also been incorporated into service pack 7 for Cisco IOS XR Software Release 5.3.4. Cisco Bug IDs: CSCvg46800.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.027 (85.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: 0.000
Affected products
- Cisco Asr 9001
- Cisco Asr 9006
- Cisco Asr 9010
- Cisco Asr 9904
- Cisco Asr 9906
- Cisco Asr 9910
- Cisco Asr 9912
- Cisco Asr 9922
- Cisco iOS Xr — versions 5.3.4
- Cisco Aggregation Services Router 9000 Series — versions Cisco Aggregation Services Router 9000 Series
Weakness classification (CWE)
References
- www.securityfocus.com/bid/102905 (VDB Entry, Third Party Advisory, vdb-entry)
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180131… (Patch, Vendor Advisory)
- www.securitytracker.com/id/1040315 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2018-0136?
- CVE-2018-0136 is a high-severity vulnerability in Cisco Asr 9001, classified under Improper Input Validation. CVSS score: 8.6/10. Published 2018-01-31.
- How severe is CVE-2018-0136?
- High severity. CVSS v3 base score is 8.6 out of 10.