CVE-2025-20146
Cisco IOS XR Software for ASR 9000 Series Routers Layer 3 Multicast Routing Denial of Service Vulnerability
Severity Score
8.6
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
A vulnerability in the Layer 3 multicast feature of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers, ASR 9902 Compact High-Performance Routers, and ASR 9903 Compact High-Performance Routers could allow an unauthenticated, remote attacker to cause a line card to reset, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of malformed IPv4 multicast packets that are received on line cards where the interface has either an IPv4 access control list (ACL) or a QoS policy applied. An attacker could exploit this vulnerability by sending crafted IPv4 multicast packets through an affected device. A successful exploit could allow the attacker to cause line card exceptions or a hard reset. Traffic over that line card would be lost while the line card reloads.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2024-10-10 CVE Reserved
- 2025-03-12 CVE Published
- 2025-03-12 CVE Updated
- 2025-03-13 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-20: Improper Input Validation
CAPEC
References (2)
| URL | Tag | Source |
|---|---|---|
| https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp | ||
| https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-multicast-ERMrSvq7 |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Cisco Search vendor "Cisco" | Cisco IOS XR Software Search vendor "Cisco" for product "Cisco IOS XR Software" | 7.11.1 Search vendor "Cisco" for product "Cisco IOS XR Software" and version "7.11.1" | en |
Affected
| ||||||
| Cisco Search vendor "Cisco" | Cisco IOS XR Software Search vendor "Cisco" for product "Cisco IOS XR Software" | 7.9.21 Search vendor "Cisco" for product "Cisco IOS XR Software" and version "7.9.21" | en |
Affected
| ||||||
| Cisco Search vendor "Cisco" | Cisco IOS XR Software Search vendor "Cisco" for product "Cisco IOS XR Software" | 7.10.2 Search vendor "Cisco" for product "Cisco IOS XR Software" and version "7.10.2" | en |
Affected
| ||||||
| Cisco Search vendor "Cisco" | Cisco IOS XR Software Search vendor "Cisco" for product "Cisco IOS XR Software" | 24.1.1 Search vendor "Cisco" for product "Cisco IOS XR Software" and version "24.1.1" | en |
Affected
| ||||||
| Cisco Search vendor "Cisco" | Cisco IOS XR Software Search vendor "Cisco" for product "Cisco IOS XR Software" | 7.11.2 Search vendor "Cisco" for product "Cisco IOS XR Software" and version "7.11.2" | en |
Affected
| ||||||
| Cisco Search vendor "Cisco" | Cisco IOS XR Software Search vendor "Cisco" for product "Cisco IOS XR Software" | 24.2.1 Search vendor "Cisco" for product "Cisco IOS XR Software" and version "24.2.1" | en |
Affected
| ||||||
| Cisco Search vendor "Cisco" | Cisco IOS XR Software Search vendor "Cisco" for product "Cisco IOS XR Software" | 24.1.2 Search vendor "Cisco" for product "Cisco IOS XR Software" and version "24.1.2" | en |
Affected
| ||||||
| Cisco Search vendor "Cisco" | Cisco IOS XR Software Search vendor "Cisco" for product "Cisco IOS XR Software" | 24.3.1 Search vendor "Cisco" for product "Cisco IOS XR Software" and version "24.3.1" | en |
Affected
| ||||||
| Cisco Search vendor "Cisco" | Cisco IOS XR Software Search vendor "Cisco" for product "Cisco IOS XR Software" | 24.2.2 Search vendor "Cisco" for product "Cisco IOS XR Software" and version "24.2.2" | en |
Affected
| ||||||
| Cisco Search vendor "Cisco" | Cisco IOS XR Software Search vendor "Cisco" for product "Cisco IOS XR Software" | 7.11.21 Search vendor "Cisco" for product "Cisco IOS XR Software" and version "7.11.21" | en |
Affected
| ||||||
| Cisco Search vendor "Cisco" | Cisco IOS XR Software Search vendor "Cisco" for product "Cisco IOS XR Software" | 24.3.2 Search vendor "Cisco" for product "Cisco IOS XR Software" and version "24.3.2" | en |
Affected
| ||||||