Cisco IOS XR on ASR routers can reset line cards via crafted IPv4
Original title: Cisco IOS XR Software for ASR 9000 Series Routers IPv4 Unicast Packets Denial of Service Vulnerability
Unauthenticated remote IPv4 packets treated as for-us traffic can reset a network processor and drop traffic.
Cisco says a flaw in IPv4 packet processing in IOS XR Software affects ASR 9000 and 9900 Series Aggregation Services Routers and ASR 9902 and 9903 Compact High-Performance Routers. An unauthenticated remote attacker can send crafted IPv4 packets that an affected line card processes as for-us traffic, causing network processor errors, a line card reset or shutdown, and a denial of service. Repeated resets can keep causing traffic loss while the card recovers. The feed snippet does not name a CVE, fixed release, or exploitation status.
Unconfirmed: The snippet does not state a CVE, fixed versions, or whether the flaw is exploited.
- Incorrect handling of crafted IPv4 packets is the stated cause.
- Packets must be received on an affected line card interface.
- An NP reset causes traffic loss while the line card recovers.
- ASR 9902 and 9903 compact routers are also affected.
Impact: Line card reset or shutdown and denial of service
| Product | Affected |
|---|---|
| Cisco IOS XR Software for ASR 9000 and 9900 Series and ASR 9902 and 9903 routers | — |
- Vendors
- Cisco
From the original article
A vulnerability in the IPv4 packet processing functionality of Cisco IOS XR Software that affects Cisco ASR 9000 and 9900 Series Aggregation Services Routers as well as Cisco ASR 9902 and 9903 Compact High-Performance Routers could allow an unauthenticated, remote attacker to cause network processor (NP) errors, resulting in a line card reset or shutdown and a denial of service (DoS) condition.
sec.cloudapps.cisco.com
A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.