CVE-2017-3876: High severity Cisco IOS XR vulnerability
A vulnerability in the Event Management Service daemon (emsd) of Cisco IOS XR routers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the affected device. The vulnerability is due to improper handling of gRPC requests. An attacker could exploit this vulnerability by repeatedly sending unauthenticated gRPC requests to the affected device. A successful exploit could allow the attacker to crash the device in such a manner that manual intervention is required to recover. This vulnerability affects all Cisco IOS XR platforms that are running release 6.1.1 of Cisco IOS XR Software when the gRPC service is enabled on the device. The gRPC service is not enabled by default. Cisco Bug IDs: CSCvb14441.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2017-3876?
CVE-2017-3876 has a high severity rating due to its potential to cause a denial of service condition.
How do I fix CVE-2017-3876?
To fix CVE-2017-3876, you should upgrade to a fixed version of Cisco IOS XR that is not susceptible to this vulnerability.
Which versions of Cisco IOS XR are affected by CVE-2017-3876?
CVE-2017-3876 specifically affects Cisco IOS XR versions 6.1.0 and 6.1.1.
What kind of attack can exploit CVE-2017-3876?
An unauthenticated, remote attacker can exploit CVE-2017-3876 to trigger a denial of service attack on the affected device.
Is authentication required to exploit CVE-2017-3876?
No, CVE-2017-3876 can be exploited by an unauthenticated attacker.