VDB-6567 · CVE-2012-4620 · XFDB 78883

Cisco IOS up to 12.2/15.2 Tunnel Interface resource management

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.5	$0-$5k	0.00

A vulnerability was found in Cisco IOS up to 12.2/15.2 (Router Operating System). It has been classified as critical. This affects an unknown functionality of the component Tunnel Interface. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. The summary by CVE is:

Cisco IOS 12.2 and 15.0 through 15.2 on Cisco 10000 series routers, when a tunnel interface exists, allows remote attackers to cause a denial of service (interface queue wedge) via tunneled (1) GRE/IP, (2) IPIP, or (3) IPv6 in IPv4 packets, aka Bug ID CSCts66808.

The weakness was disclosed 09/26/2012 with Cisco as cisco-sa-20120926-c10k-tunnels as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. The public release has been coordinated in cooperation with Cisco. This vulnerability is uniquely identified as CVE-2012-4620 since 08/24/2012. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 62371 (Cisco IOS Software Tunneled Traffic Queue Wedge Vulnerability (cisco-sa-20120926-c10k-tunnels)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43284 (Cisco IOS Software Tunneled Traffic Queue Wedge Vulnerability (cisco-sa-20120926-c10k-tunnels)).

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (78883) and Tenable (62371). The entries 6570, 6569, 6568 and 6566 are pretty similar.

Productinfo

Type

Router Operating System

Vendor

Cisco

Name

Version

License

commercial

Support

end of life (old version)

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 7.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 62371
Nessus Name: Cisco IOS Software Tunneled Traffic Queue Wedge Vulnerability (cisco-sa-20120926-c10k-tunnels)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

08/24/2012 🔍
09/26/2012 +33 days 🔍
09/26/2012 +0 days 🔍
09/26/2012 +0 days 🔍
09/26/2012 +0 days 🔍
09/26/2012 +0 days 🔍
09/26/2012 +0 days 🔍
09/27/2012 +1 days 🔍
09/27/2012 +0 days 🔍
09/28/2012 +1 days 🔍
09/28/2012 +0 days 🔍
10/01/2012 +3 days 🔍
04/14/2021 +3117 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20120926-c10k-tunnels
Organization: Cisco
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2012-4620 (🔍)
X-Force: 78883 - Cisco IOS tunneled denial of service, Medium Risk
SecurityTracker: 1027578 - Cisco IOS on Cisco 10000 Series Tunneled Traffic Lets Remote Users Deny Service
Vulnerability Center: 36262 - [cisco-sa-20120926-c10k-tunnels] Cisco IOS on Cisco 10000 Routers Remote DoS via IP Tunneled Packets, High
SecurityFocus: 55696 - Cisco IOS Queue Wedge CVE-2012-4620 Denial of Service Vulnerability
Secunia: 50771 - Cisco IOS Cisco 10000 Series Routers Tunneled Packets Handling Denial of Service Vulnerabi, Less Critical
OSVDB: 85811

See also: 🔍

Entryinfo

Created: 10/01/2012 17:16
Updated: 04/14/2021 14:41
Changes: 10/01/2012 17:16 (82), 04/17/2017 11:29 (6), 04/14/2021 14:41 (3)
Complete: 🔍
Committer: