Denial of service in Cisco IOS XR

1) Allocation of Resources Without Limits or Throttling

EUVDB-ID: #VU105691

Risk: Medium

CVSSv4.0: 2.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H/E:U/U:Green]

CVE-ID: CVE-2025-20141

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to incorrect handling of packets that are punted to the route processor. A remote attacker on the local network can cause a denial of service condition on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco IOS XR: 7.9.2 - 7.10.1

IOS XR White box: All versions

NCS540: All versions

NCS5500: All versions

NCS 5700 Series Routers: All versions

CPE2.3

• cpe:2.3:o:cisco_systems:cisco_ios_xr:7.9.2:*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_ios_xr:7.10.1:*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:ios_xr_white_box:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:ncs540:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:ncs5500:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:ncs_5700_series_routers:*:*:*:*:*:*:*:*

External links

http://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/
http://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xr792-bWfVDPY

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.