VAR-200512-0321
Vulnerability from variot - Updated: 2023-12-18 14:02Unspecified vulnerability in the VLAN Trunking Protocol (VTP) feature in Cisco IOS 12.1(22)EA3 on Catalyst 2950T switches allows remote attackers to cause a denial of service (device reboot) via a crafted Subset-Advert message packet, a different issue than CVE-2006-4774, CVE-2006-4775, and CVE-2006-4776. The VLAN Trunking Protocol (VTP) is Cisco's proprietary protocol for centralized management of VLANs.
If a malformed VTP packet is received, some switch devices may be overloaded. However, an attacker must know the VTP domain name and send malformed VTP packets to the port configured for relay on the switch to exploit this vulnerability. Multiple Cisco switches are prone to a denial-of-service vulnerability. An attacker can exploit this issue to cause affected devices to restart, effectively denying service to legitimate users.
Secunia is proud to announce the availability of the Secunia Software Inspector.
The Secunia Software Inspector is a free service that detects insecure versions of software that you may have installed in your system. When insecure versions are detected, the Secunia Software Inspector also provides thorough guidelines for updating the software to the latest secure version from the vendor.
Try it out online: http://secunia.com/software_inspector/
TITLE: Cisco IOS VTP Denial of Service Vulnerability
SECUNIA ADVISORY ID: SA23892
VERIFY ADVISORY: http://secunia.com/advisories/23892/
CRITICAL: Less critical
IMPACT: DoS
WHERE:
From local network
OPERATING SYSTEM: Cisco IOS 12.x http://secunia.com/product/182/ Cisco IOS R12.x http://secunia.com/product/50/
DESCRIPTION: David Barroso Berrueta and Alfredo Andres Omella have reported a vulnerability in Cisco IOS, which can be exploited by malicious people to cause a DoS (Denial of Service). This can be exploited to cause a device to reload by sending a specially crafted VTP packet.
Successful exploitation requires knowledge of the VTP domain name and the port that is configured for trunking.
PROVIDED AND/OR DISCOVERED BY: Alfredo Andres Omella and David Barroso Berrueta, S21SEC
ORIGINAL ADVISORY: Cisco Advisory: http://www.cisco.com/en/US/products/products_security_response09186a00807d1a81.html
21SEC Advisory: http://www.s21sec.com/es/avisos/s21sec-034-en.txt
About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities.
Subscribe: http://secunia.com/secunia_security_advisories/
Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/
Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor.
Unsubscribe: Secunia Security Advisories http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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