Cisco IOS up to 12.4 DLSw Message denial of service

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

Summaryinfo

A vulnerability identified as critical has been detected in Cisco IOS up to 12.4. The impacted element is an unknown function of the component DLSw Message Handler. Performing a manipulation results in denial of service. This vulnerability was named CVE-2007-0199. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco IOS up to 12.4 (Router Operating System). It has been classified as critical. This affects some unknown functionality of the component DLSw Message Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

The Data-link Switching (DLSw) feature in Cisco IOS 11.0 through 12.4 allows remote attackers to cause a denial of service (device reload) via "an invalid value in a DLSw message... during the capabilities exchange."

The weakness was presented 01/11/2006 by Martyn Ruks with MWR InfoSecurity (Website). It is possible to read the advisory at cisco.com. This vulnerability is uniquely identified as CVE-2007-0199 since 01/10/2007. 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 attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 24019 (Cisco IOS Data-link Switching (DLSw) Capabilities Exchange Remote DoS (CSCsf28840)), 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 43179 (Cisco IOS DLSw Vulnerability (cisco-sa-20070110-dlsw)).

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 2 years after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (31394), Tenable (24019), SecurityFocus (BID 21990†), OSVDB (32683†) and Secunia (SA23697†). 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: 6.7

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: Denial of service
CWE: 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: 24019
Nessus Name: Cisco IOS Data-link Switching (DLSw) Capabilities Exchange Remote DoS (CSCsf28840)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
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: 🔍

Patch: cisco.com

Timelineinfo

01/11/2006 🔍
01/10/2007 +364 days 🔍
01/10/2007 +0 days 🔍
01/10/2007 +0 days 🔍
01/10/2007 +0 days 🔍
01/11/2007 +1 days 🔍
01/11/2007 +0 days 🔍
01/12/2007 +0 days 🔍
01/12/2007 +0 days 🔍
01/16/2007 +4 days 🔍
01/17/2007 +1 days 🔍
06/14/2025 +6723 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco.com
Researcher: Martyn Ruks
Organization: MWR InfoSecurity
Status: Confirmed

CVE: CVE-2007-0199 (🔍)
GCVE (CVE): GCVE-0-2007-0199
GCVE (VulDB): GCVE-100-2823

OVAL: 🔍

X-Force: 31394
SecurityFocus: 21990 - Cisco IOS Data-link Switching Denial Of Service Vulnerability
Secunia: 23697 - Cisco IOS DLSw Denial Of Service Vulnerability, Less Critical
OSVDB: 32683 - Cisco IOS Data-link Switching (DLSw) Capabilities Exchange Remote DoS
SecurityTracker: 1017498 - Cisco IOS DLSw Capabilities Exchange Lets Remote Users Cause the Device to Reload
Vulnerability Center: 14039 - [cisco-sa-20070110-dlsw] Cisco IOS 11-12.4 DLSw Message Can Result in a Reload of the DLSw Device, Low
Vupen: ADV-2007-0139

Entryinfo

Created: 01/12/2007 11:23
Updated: 06/14/2025 16:31
Changes: 01/12/2007 11:23 (82), 01/11/2019 12:20 (10), 03/15/2021 07:53 (2), 06/14/2025 16:31 (16)
Complete: 🔍
Cache ID: 216:7A1:103

Be aware that VulDB is the high quality source for vulnerability data.

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