CVE-2023-20049
7.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 3.9 / Impact: 3.6
Source: NVD
Description
A vulnerability in the bidirectional forwarding detection (BFD) hardware offload 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 BFD packets that are received on line cards where the BFD hardware offload feature is enabled. An attacker could exploit this vulnerability by sending a crafted IPv4 BFD packet to an affected device. A successful exploit could allow the attacker to cause line card exceptions or a hard reset, resulting in loss of traffic over that line card while the line card reloads.
Affected (3)
Configuration A
| Vulnerable Software | Affected Versions |
|---|---|
| Before 7.5.3 |
| Running on/with | Platform Versions |
|---|---|
Cisco Asr 9000v V2 | All versions |
Cisco Asr 9001 | All versions |
Cisco Asr 9006 | All versions |
Cisco Asr 9010 | All versions |
Cisco Asr 9901 | All versions |
Cisco Asr 9902 | All versions |
Cisco Asr 9903 | All versions |
Cisco Asr 9904 | All versions |
Cisco Asr 9906 | All versions |
Cisco Asr 9910 | All versions |
Cisco Asr 9912 | All versions |
Cisco Asr 9922 | All versions |
Related CWEs
CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
CWE-805
Buffer Access with Incorrect Length Value
The product uses a sequential operation to read or write a buffer, but it uses an incorrect length value that causes it to access memory that is outside of the bounds of the buffer.
References (2)
Source: psirt@cisco.com
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
Timeline
No history available yet.