Cisco IOS 12.0s/12.0sx/12.0sz input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco IOS 12.0s/12.0sx/12.0sz. It has been declared as critical. The affected element is an unknown function. Such manipulation leads to input validation. This vulnerability is traded as CVE-2008-3803. There is no exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Cisco IOS 12.0s/12.0sx/12.0sz (Router Operating System) and classified as critical. Affected by this issue is some unknown processing. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A "logic error" in Cisco IOS 12.0 through 12.4, when a Multiprotocol Label Switching (MPLS) VPN with extended communities is configured, sometimes causes a corrupted route target (RT) to be used, which allows remote attackers to read traffic from other VPNs in opportunistic circumstances.

The bug was discovered 09/24/2008. The weakness was shared 09/26/2008 (Website). The advisory is shared for download at vupen.com. This vulnerability is handled as CVE-2008-3803 since 08/27/2008. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 49028 (Cisco IOS MPLS VPN May Leak Information - 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 43150 (Cisco IOS MPLS VPN May Leak Information (cisco-sa-20080924-vpn)).

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 (45382), Tenable (49028), SecurityFocus (BID 31366†), OSVDB (48742†) and Secunia (SA31990†). The entries VDB-44214, VDB-44213, VDB-44212 and VDB-44211 are related to this item. Once again VulDB remains the best 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: 5.6
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.6
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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: 49028
Nessus Name: Cisco IOS MPLS VPN May Leak Information - Cisco Systems
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/27/2008 🔍
09/24/2008 +28 days 🔍
09/24/2008 +0 days 🔍
09/24/2008 +0 days 🔍
09/24/2008 +0 days 🔍
09/25/2008 +1 days 🔍
09/25/2008 +0 days 🔍
09/26/2008 +1 days 🔍
09/26/2008 +0 days 🔍
09/01/2010 +705 days 🔍
03/17/2015 +1658 days 🔍
05/26/2025 +3723 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: vupen.com⛔
Status: Confirmed

CVE: CVE-2008-3803 (🔍)
GCVE (CVE): GCVE-0-2008-3803
GCVE (VulDB): GCVE-100-44204

OVAL: 🔍

X-Force: 45382
SecurityFocus: 31366 - Cisco IOS MPLS VPN Information Disclosure Vulnerability
Secunia: 31990
OSVDB: 48742 - CVE-2008-3803 - Cisco - IOS - Information Disclosure Issue
SecurityTracker: 1020940
Vulnerability Center: 19581 - [cisco-sa-20080924-vpn] Cisco IOS MPLS VPN Remote Sensitive Information Disclosure Vulnerability, Low
Vupen: ADV-2008-2670

See also: 🔍

Entryinfo

Created: 03/17/2015 16:11
Updated: 05/26/2025 07:22
Changes: 03/17/2015 16:11 (66), 08/17/2019 16:17 (12), 05/26/2025 07:22 (18)
Complete: 🔍
Cache ID: 216::103

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