Vulnerability Description
A vulnerability in the DHCP code for the Zero Touch Provisioning feature of Cisco ASR 920 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to a format string vulnerability when processing a crafted DHCP packet for Zero Touch Provisioning. An attacker could exploit this vulnerability by sending a specially crafted DHCP packet to an affected device. An exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition. This vulnerability affects Cisco ASR 920 Series Aggregation Services Routers that are running an affected release of Cisco IOS XE Software (3.13 through 3.18) and are listening on the DHCP server port. By default, the devices do not listen on the DHCP server port. Cisco Bug IDs: CSCuy56385.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Ios Xe | 3.13.4s |
| Cisco | Asr-920-12Cz-A | - |
| Cisco | Asr-920-12Cz-D | - |
| Cisco | Asr-920-12Sz-Im | - |
| Cisco | Asr-920-24Sz-Im | - |
| Cisco | Asr-920-24Sz-M | - |
| Cisco | Asr-920-24Tz-M | - |
| Cisco | Asr-920-4Sz-A | - |
| Cisco | Asr-920-4Sz-D | - |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/97008Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1038104
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
- http://www.securityfocus.com/bid/97008Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1038104
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
FAQ
What is CVE-2017-3859?
CVE-2017-3859 is a vulnerability with a CVSS score of 7.5 (HIGH). A vulnerability in the DHCP code for the Zero Touch Provisioning feature of Cisco ASR 920 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause an affected devic...
How severe is CVE-2017-3859?
CVE-2017-3859 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-3859?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Ios Xe, Cisco Asr-920-12Cz-A, Cisco Asr-920-12Cz-D, Cisco Asr-920-12Sz-Im, Cisco Asr-920-24Sz-Im.