Cisco IOS 11.2.8 VLAN 802.1q privileges management

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco IOS 11.2.8 and classified as critical. Affected is an unknown function of the component VLAN 802.1q Handler. Such manipulation leads to privileges management. This vulnerability is documented as CVE-1999-1129. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Cisco IOS 11.2.8 (Router Operating System). Affected by this issue is an unknown code of the component VLAN 802.1q Handler. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Cisco Catalyst 2900 Virtual LAN (VLAN) switches allow remote attackers to inject 802.1q frames into another VLAN by forging the VLAN identifier in the trunking tag.

The weakness was released 09/01/1999 by Andrew as not defined posting (Bugtraq). The advisory is shared for download at securityfocus.com. This vulnerability is handled as CVE-1999-1129. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (3294), SecurityFocus (BID 615†) and Vulnerability Center (SBV-27084†). Entry connected to this vulnerability is available at VDB-27680. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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: Privileges management
CWE: CWE-269 / 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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/01/1999 🔍
09/01/1999 +0 days 🔍
09/01/1999 +0 days 🔍
09/02/1999 +1 days 🔍
09/12/2010 +4028 days 🔍
06/21/2014 +1378 days 🔍
04/19/2026 +4320 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: securityfocus.com⛔
Researcher: Andrew
Status: Confirmed

CVE: CVE-1999-1129 (🔍)
GCVE (CVE): GCVE-0-1999-1129
GCVE (VulDB): GCVE-100-14816
X-Force: 3294 - Multiple vendor 802.1q VLAN implementations allow injected frames
SecurityFocus: 615 - IEEE 802.1q Unauthorized VLAN Traversal Weakness
Vulnerability Center: 27084 - Cisco Catalyst 2900 Virtual LAN Switches Allows Remote VLAN Spoofing, High

See also: 🔍

Entryinfo

Created: 06/21/2014 21:51
Updated: 04/19/2026 11:23
Changes: 06/21/2014 21:51 (58), 03/04/2017 14:48 (6), 04/19/2026 11:23 (18)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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