CVE-2020-3449
Description
A vulnerability in the Border Gateway Protocol (BGP) additional paths feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to prevent authorized users from monitoring the BGP status and cause the BGP process to stop processing new updates, resulting in a denial of service (DOS) condition. The vulnerability is due to an incorrect calculation of lexicographical order when displaying additional path information within Cisco IOS XR Software, which causes an infinite loop. An attacker could exploit this vulnerability by sending a specific BGP update from a BGP neighbor peer session of an affected device; an authorized user must then issue a show bgp command for the vulnerability to be exploited. A successful exploit could allow the attacker to prevent authorized users from properly monitoring the BGP status and prevent BGP from processing new updates, resulting in outdated information in the routing and forwarding tables.
Risk Information
Associated Vulnerability
| Vulnerability | OS Platform |
|---|---|
| Cisco IOS XR Software Additional Paths Denial of Service Vulnerability For Cisco ASR 9000 Series Aggregation Services Routers | NCM |
| Cisco IOS XR Software Additional Paths Denial of Service Vulnerability For Cisco Network Convergence System 6000 Series Routers | NCM |
| Cisco IOS XR Software Additional Paths Denial of Service Vulnerability For Cisco Network Convergence System 4000 Series | NCM |
| Cisco IOS XR Software Additional Paths Denial of Service Vulnerability For Cisco IOS XRv 9000 Router | NCM |
| Cisco IOS XR Software Additional Paths Denial of Service Vulnerability For Cisco Network Convergence System 5000 Series | NCM |
| Cisco IOS XR Software Additional Paths Denial of Service Vulnerability For Cisco Network Convergence System 5500 Series | NCM |
| Cisco IOS XR Software Additional Paths Denial of Service Vulnerability For Cisco Network Convergence System 1000 Series | NCM |
| Cisco IOS XR Software Additional Paths Denial of Service Vulnerability For Cisco Network Convergence System 500 Series Routers | NCM |
| Cisco IOS XR Software Additional Paths Denial of Service Vulnerability For Cisco 8000 Series Routers | NCM |
| Improper Check for Unusual or Exceptional Conditions Vulnerability (CVE-2020-3449) | NCM |
Patch Details
Click to see the patches provided by ManageEngine for this CVE
| Patch ID | Patch Description |
|---|---|
| PATCH-1705564 | Security Update for Cisco ASR 9000 Series Aggregation Services Routers 5.3.0.1i.BASE |
| PATCH-1705630 | Security Update for Cisco Network Convergence System 6000 Series Routers 6.1.4 |
| PATCH-1705272 | Security Update for Cisco Network Convergence System 4000 Series 7.2.2 |
| PATCH-1705219 | Security Update for Cisco IOS XRv 9000 Router 7.1.2.1i.BASE |
| PATCH-1706021 | Security Update for Cisco Network Convergence System 5000 Series 6.2.1.21i.BASE |
| PATCH-1705220 | Security Update for Cisco Network Convergence System 5500 Series 7.1.2.1i.BASE |
| PATCH-1705124 | Security Update for Cisco Network Convergence System 1000 Series 7.2.1.9i.ROUT |
| PATCH-1705229 | Security Update for Cisco Network Convergence System 500 Series Routers 7.2.1.21i.BASE |
| PATCH-1705230 | Security Update for Cisco 8000 Series Routers 7.2.1.21i.BASE |
References
https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234