Vulnerability in Cisco Asr1000-Esp100
CVE-2023-20187
A vulnerability in the Multicast Leaf Recycle Elimination (mLRE) feature of Cisco IOS XE Software for Cisco ASR 1000 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect handling of certain IPv6 multicast packets when they are fanned out more than seven times on an affected device. An attacker could exploit this vulnerability by sending a specific IPv6 multicast or IPv6 multicast VPN (MVPNv6) packet through the affected device. A successful exploit could allow the attacker to cause a reload of the affected device, resulting in a DoS condition.
EPSS: 0.007 (47.5th percentile) — read the EPSS interpretation.
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.
Affected products
- Cisco Asr1000-esp100
- Cisco Asr1000-esp200
- Cisco Asr1000-esp40
- Cisco Asr1001-hx
- Cisco Asr1001-x
- Cisco Asr1002-hx
- Cisco Asr1002-x
- Cisco Ios Xe Software — versions 3.7.1S, 3.7.2S, 3.7.3S
- Cisco Ios_xe — versions 3.7.1s, 3.7.2s, 3.7.2ts
Weakness classification (CWE)
References
- psirt@cisco.com (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2023-20187?
- CVE-2023-20187 is a high-severity vulnerability in Cisco Asr1000-Esp100, classified under CWE-823. CVSS score: 8.6/10. Published 2023-09-27.
- How severe is CVE-2023-20187?
- High severity. CVSS v3 base score is 8.6 out of 10.