Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Ios Xr | 5.3.4 |
| Cisco | Asr 9001 | - |
| Cisco | Asr 9006 | - |
| Cisco | Asr 9010 | - |
| Cisco | Asr 9904 | - |
| Cisco | Asr 9906 | - |
| Cisco | Asr 9910 | - |
| Cisco | Asr 9912 | - |
| Cisco | Asr 9922 | - |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/102905Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040315Third Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2PatchVendor Advisory
- http://www.securityfocus.com/bid/102905Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040315Third Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2PatchVendor Advisory
FAQ
What is CVE-2018-0136?
CVE-2018-0136 is a vulnerability with a CVSS score of 8.6 (HIGH). 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 re...
How severe is CVE-2018-0136?
CVE-2018-0136 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-0136?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Ios Xr, Cisco Asr 9001, Cisco Asr 9006, Cisco Asr 9010, Cisco Asr 9904.