Cisco IOS up to 12.2 HSRP denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco IOS 11.1/11.2/12.0/12.1/12.2. It has been rated as problematic. The impacted element is an unknown function of the component HSRP Handler. This manipulation causes denial of service. This vulnerability is handled as CVE-2002-1768. There is not any exploit available. It is advisable to implement restrictive firewalling.

Detailsinfo

A vulnerability was found in Cisco IOS 11.1/11.2/12.0/12.1/12.2 (Router Operating System). It has been declared as problematic. Affected by this vulnerability is an unknown function of the component HSRP Handler. The manipulation 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. The summary by CVE is:

Cisco IOS 11.1 through 12.2, when HSRP support is not enabled, allows remote attackers to cause a denial of service (CPU consumption) via randomly sized UDP packets to the Hot Standby Routing Protocol (HSRP) port 1985.

The weakness was released 12/31/2002 by Andrew (Website). It is possible to read the advisory at xforce.iss.net. This vulnerability is known as CVE-2002-1768 since 06/21/2005. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 17772 (Cisco IOS Hot Standby Routing Protocol Crafted UDP Packets Denial of Service), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO and running in the context l.

Proper firewalling of is able to address this issue. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (9282), Tenable (17772), SecurityFocus (BID 4948†) and Vulnerability Center (SBV-6155†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

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: 17772
Nessus Name: Cisco IOS Hot Standby Routing Protocol Crafted UDP Packets Denial of Service
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/05/2002 🔍
06/05/2002 +0 days 🔍
06/06/2002 +1 days 🔍
12/31/2002 +208 days 🔍
12/31/2002 +0 days 🔍
11/25/2004 +695 days 🔍
06/21/2005 +208 days 🔍
01/10/2012 +2394 days 🔍
08/04/2014 +937 days 🔍
05/26/2019 +1756 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: xforce.iss.net
Researcher: Andrew
Status: Not defined

CVE: CVE-2002-1768 (🔍)
GCVE (CVE): GCVE-0-2002-1768
GCVE (VulDB): GCVE-100-19411
X-Force: 9282
SecurityFocus: 4948 - Cisco Malformed HSRP Traffic Denial of Service Vulnerability
Vulnerability Center: 6155 - DoS in Cisco IOS via Malformed HSRP Packets when HSRP is Disabled, Medium

Entryinfo

Created: 08/04/2014 16:55
Updated: 05/26/2019 20:17
Changes: 08/04/2014 16:55 (67), 05/26/2019 20:17 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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