Cisco IOS XR 4.3.4 through 5.3.0 on ASR 9000 devices, when uRPF, PBR, QoS, or an ACL is configured, does not properly handle bridge-group virtual interface (BVI) traffic, which allows remote attackers to cause a denial of service (chip and card hangs and reloads) by triggering use of a BVI interface for IPv4 packets, aka Bug ID CSCur62957.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ios_xr | Cisco | 4.3.0 (including) | 4.3.0 (including) |
| Ios_xr | Cisco | 4.3.1 (including) | 4.3.1 (including) |
| Ios_xr | Cisco | 4.3.2 (including) | 4.3.2 (including) |
| Ios_xr | Cisco | 4.3.3 (including) | 4.3.3 (including) |
| Ios_xr | Cisco | 5.1.0 (including) | 5.1.0 (including) |
| Ios_xr | Cisco | 5.1.1 (including) | 5.1.1 (including) |
| Ios_xr | Cisco | 5.1.2 (including) | 5.1.2 (including) |
| Ios_xr | Cisco | 5.2.0 (including) | 5.2.0 (including) |
| Ios_xr | Cisco | 5.2.1 (including) | 5.2.1 (including) |
References
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150415-iosxr
- http://www.securityfocus.com/bid/74162
- http://www.securitytracker.com/id/1032139
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150415-iosxr
- http://www.securityfocus.com/bid/74162
- http://www.securitytracker.com/id/1032139