Cisco IOS up to 12.2/15.2 Tunnel Interface resource management

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Cisco IOS up to 12.2/15.2. Affected by this vulnerability is an unknown functionality of the component Tunnel Interface. Performing a manipulation results in resource management. This vulnerability is reported as CVE-2012-4620. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

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), Tenable (62371), SecurityFocus (BID 55696†), OSVDB (85811†) and Secunia (SA50771†). The entries VDB-6570, VDB-6569, VDB-6568 and VDB-6566 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

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: 6.5

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

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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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 (🔍)
GCVE (CVE): GCVE-0-2012-4620
GCVE (VulDB): GCVE-100-6567
X-Force: 78883 - Cisco IOS tunneled denial of service, Medium Risk
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
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

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:
Cache ID: 216:D29:103

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