Vulnerability in Cisco iOS Xr
CVE-2017-3876
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.025 (84.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.023 · newest: 0.025 · change: +0.002
Affected products
- Cisco iOS Xr — versions 6.1.0, 6.1.1
- Cisco iOS Xr — versions Cisco IOS XR
Weakness classification (CWE)
References
- www.securityfocus.com/bid/98284 (VDB Entry, Third Party Advisory, vdb-entry)
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170503… (Vendor Advisory)
- www.securitytracker.com/id/1038393 (vdb-entry)
Frequently asked questions
- What is CVE-2017-3876?
- CVE-2017-3876 is a high-severity vulnerability in Cisco iOS Xr, classified under CWE-399. CVSS score: 7.5/10. Published 2017-05-16.
- How severe is CVE-2017-3876?
- High severity. CVSS v3 base score is 7.5 out of 10.