Cisco IOS up to 12.1(10) BGP log-neighbor-changes denial of service

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Cisco IOS up to 12.1(10). The impacted element is an unknown function of the component BGP. Executing a manipulation of the argument log-neighbor-changes can lead to denial of service. This vulnerability is tracked as CVE-2005-0196. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Cisco IOS up to 12.1(10) (Router Operating System). This vulnerability affects an unknown function of the component BGP. The manipulation of the argument log-neighbor-changes with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. CVE summarizes:

Cisco IOS 12.0 through 12.3YL, with BGP enabled and running the bgp log-neighbor-changes command, allows remote attackers to cause a denial of service (device reload) via a malformed BGP packet.

The bug was discovered 01/26/2005. The weakness was disclosed 01/26/2005 with Cisco (Website). The advisory is available at cisco.com. This vulnerability was named CVE-2005-0196 since 01/31/2005. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 17635 (Cisco IOS Malformed BGP Packet Processing Remote DoS (CSCee67450)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO, running in the context l and relying on port 161. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43086 (Cisco IOS Border Gateway Protocol Processing Remote Denial of Service Vulnerability).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at cisco.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (19074), Tenable (17635), SecurityFocus (BID 12370†), OSVDB (13192†) and Secunia (SA14034†). The entries VDB-1164 and VDB-1160 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 17635
Nessus Name: Cisco IOS Malformed BGP Packet Processing Remote DoS (CSCee67450)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: cisco.com
ISS Proventia IPS: 🔍

Timelineinfo

01/26/2005 🔍
01/26/2005 +0 days 🔍
01/26/2005 +0 days 🔍
01/26/2005 +0 days 🔍
01/26/2005 +0 days 🔍
01/26/2005 +0 days 🔍
01/27/2005 +1 days 🔍
01/27/2005 +0 days 🔍
01/30/2005 +2 days 🔍
01/31/2005 +1 days 🔍
01/31/2005 +0 days 🔍
03/25/2005 +53 days 🔍
05/02/2005 +38 days 🔍
07/05/2025 +7369 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco.com
Researcher: http://www.cisco.com
Organization: Cisco
Status: Confirmed

CVE: CVE-2005-0196 (🔍)
GCVE (CVE): GCVE-0-2005-0196
GCVE (VulDB): GCVE-100-1162

OVAL: 🔍

CERT: 🔍
X-Force: 19074 - Cisco IOS BGP packet denial of service and gain full control, Medium Risk
SecurityFocus: 12370 - Cisco IOS Border Gateway Protocol Processing Remote Denial Of Service Vulnerability
Secunia: 14034 - Cisco IOS BGP Protocol Processing Denial of Service, Less Critical
OSVDB: 13192 - Cisco IOS Malformed BGP Packet DoS
SecurityTracker: 1013013
Vulnerability Center: 6931 - [cisco-sa-20050126-bgp] DoS in Cisco IOS 12.0 - 12.3 via BGP, Medium

See also: 🔍

Entryinfo

Created: 01/31/2005 11:00
Updated: 07/05/2025 16:40
Changes: 01/31/2005 11:00 (96), 07/01/2019 09:01 (2), 12/16/2024 11:09 (16), 07/05/2025 16:40 (2)
Complete: 🔍
Cache ID: 216:D59:103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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