Cisco IOS up to 12.2t Express Forwarding Processing information disclosure

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

Summaryinfo

A vulnerability described as problematic has been identified in Cisco IOS up to 12.2t. This impacts an unknown function of the component Express Forwarding Processing Module. The manipulation results in information disclosure. This vulnerability is cataloged as CVE-2002-0339. There is no exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability classified as problematic has been found in Cisco IOS up to 12.2t (Router Operating System). Affected is an unknown code block of the component Express Forwarding Processing Module. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on integrity. CVE summarizes:

Cisco IOS 11.1CC through 12.2 with Cisco Express Forwarding (CEF) enabled includes portions of previous packets in the padding of a MAC level packet when the MAC packet s length is less than the IP level packet length.

The bug was discovered 02/27/2002. The weakness was shared 02/27/2002 by Cisco Security with Cisco as confirmed advisory (CERT.org). The advisory is shared for download at kb.cert.org. This vulnerability is traded as CVE-2002-0339. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability scanner Nessus provides a plugin with the ID 48964 (Data Leak with Cisco Express Forwarding Enabled - 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 43181 (Cisco IOS Data Leak with Cisco Express Forwarding Enabled (cisco-sa-20020227-ios-cef)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (8296), Tenable (48964), SecurityFocus (BID 4191†), OSVDB (806†) and Vulnerability Center (SBV-2071†). 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: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 48964
Nessus Name: Data Leak with Cisco Express Forwarding Enabled - 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: 🔍

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

Timelineinfo

01/01/2002 🔍
02/27/2002 +57 days 🔍
02/27/2002 +0 days 🔍
02/27/2002 +0 days 🔍
02/27/2002 +0 days 🔍
06/25/2002 +118 days 🔍
09/12/2002 +79 days 🔍
09/10/2003 +362 days 🔍
09/01/2010 +2548 days 🔍
07/11/2014 +1409 days 🔍
09/19/2025 +4088 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: kb.cert.org
Researcher: Cisco Security
Organization: Cisco
Status: Confirmed

CVE: CVE-2002-0339 (🔍)
GCVE (CVE): GCVE-0-2002-0339
GCVE (VulDB): GCVE-100-18324

OVAL: 🔍

CERT: 🔍
X-Force: 8296
SecurityFocus: 4191 - Cisco IOS Cisco Express Forwarding Session Information Leakage Vulnerability
OSVDB: 806 - Cisco IOS Cisco Express Forwarding (CEF) Previous Packet Information Disclosure
Vulnerability Center: 2071 - Cisco IOS 11.1CC - 12.2 with Cisco Express Forwarding \x27enabled\x27 Allows Information Leakage, Low

Entryinfo

Created: 07/11/2014 14:15
Updated: 09/19/2025 15:04
Changes: 07/11/2014 14:15 (69), 05/12/2019 21:08 (6), 06/18/2024 03:24 (17), 09/19/2025 15:04 (3)
Complete: 🔍
Cache ID: 216::103

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