Cisco IOS 12.4t/12.4xz/12.4ya resource management

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco IOS 12.4t/12.4xz/12.4ya. It has been classified as problematic. This issue affects some unknown processing. The manipulation leads to resource management. This vulnerability is documented as CVE-2009-0635. There is not any exploit available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in Cisco IOS 12.4t/12.4xz/12.4ya (Router Operating System) and classified as critical. This issue affects an unknown code block. The manipulation with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. The summary by CVE is:

Memory leak in the Cisco Tunneling Control Protocol (cTCP) encapsulation feature in Cisco IOS 12.4, when an Easy VPN (aka EZVPN) server is enabled, allows remote attackers to cause a denial of service (memory consumption and device crash) via a sequence of TCP packets.

The bug was discovered 03/25/2009. The weakness was released 03/27/2009 (Website). The advisory is shared at cisco.com. The identification of this vulnerability is CVE-2009-0635 since 02/18/2009. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 49029 (Cisco IOS cTCP Denial of Service Vulnerability - Cisco Systems), 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. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43152 (Cisco IOS cTCP Denial of Service Vulnerability (cisco-sa-20090325-ctcp)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (49417), Tenable (49029), SecurityFocus (BID 34246†), OSVDB (53134†) and Secunia (SA34438†). Entries connected to this vulnerability are available at VDB-47383, VDB-47382, VDB-47380 and VDB-47379. If you want to get the best quality for vulnerability data then you always have to consider 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: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 49029
Nessus Name: Cisco IOS cTCP Denial of Service Vulnerability - Cisco Systems
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 64169
OpenVAS Name: Ubuntu USN-743-1 (gs-gpl)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/18/2009 🔍
03/25/2009 +35 days 🔍
03/25/2009 +0 days 🔍
03/25/2009 +0 days 🔍
03/25/2009 +0 days 🔍
03/25/2009 +0 days 🔍
03/26/2009 +1 days 🔍
03/26/2009 +0 days 🔍
03/27/2009 +1 days 🔍
03/27/2009 +0 days 🔍
09/01/2010 +523 days 🔍
03/17/2015 +1658 days 🔍
05/03/2025 +3700 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-0635 (🔍)
GCVE (CVE): GCVE-0-2009-0635
GCVE (VulDB): GCVE-100-47381
X-Force: 49417
SecurityFocus: 34246 - Cisco IOS Cisco Tunneling Control Protocol Remote Denial of Service Vulnerability
Secunia: 34438 - Cisco IOS Multiple Vulnerabilities, Moderately Critical
OSVDB: 53134 - CVE-2009-0635 - Cisco - IOS - Denial of Service Issue
SecurityTracker: 1021895
Vulnerability Center: 21383 - [cisco-sa-20090325-ctcp] Cisco IOS 12.4T, 12.4XZ and 12.4YAis Remote DoS Vulnerability, High
Vupen: ADV-2009-0851

See also: 🔍

Entryinfo

Created: 03/17/2015 23:38
Updated: 05/03/2025 12:07
Changes: 03/17/2015 23:38 (80), 08/31/2019 14:03 (5), 05/03/2025 12:07 (18)
Complete: 🔍
Cache ID: 216::103

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