NetBSD PPPoE packet denial of service
| netbsd-pppoe-dos (44679) |  Medium Risk |
Description:
NetBSD could allow a remote attacker from within the local network to cause a denial of service, caused by a buffer overflow when processing PPPoE tags. If a PPPoE interface has been created, a remote attacker could send a specially-crafted PPPoE packet to the system, to cause the kernel to crash.
*CVSS:
| Base Score: | 2.9 |
| Access Vector: | Adjacent Network |
| Access Complexity: | Medium |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 2.1 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Refer to NetBSD Security Advisory 2008-010 for patch, upgrade or suggested workaround information. See References.
For other distributions:
Apply the appropriate update for your system. See References.
References:
- Apple Web site: About the security content of Time Capsule and AirPort Base Station (802.11n*) Firmware 7.4.1 .
- NetBSD Security Advisory 2008-010: Malicious PPPoE discovery packet can overrun a kernel buffer.
- NetBSD Web site: The NetBSD Project.
- BID-30838: NetBSD PPPoE Discovery Packet Remote Denial of Service Vulnerability
- CVE-2008-3584: NetBSD 3.0, 3.1, and 4.0, when a pppoe instance exists, does not properly check the length of a PPPoE packet tag, which allows remote attackers to cause a denial of service (system crash) via a crafted PPPoE packet.
- SA31597: NetBSD PPPoE Packet Processing Tag Length Vulnerability
- SA34105: Apple Airport Extreme / Time Capsule Multiple Vulnerabilities
- SECTRACK ID: 1020749: NetBSD PPPoE Discovery Packet Processing Bug Lets Remote Users Deny Service
- VUPEN/ADV-2009-0633: Apple Airport Extreme and Time Capsule Denial of Service Vulnerabilities
Platforms Affected:
- Apple 802.11n 7.4.1
- Apple AirPort Express Base Station
- Apple AirPort Extreme Base Station
- NetBSD NetBSD 3.0
- NetBSD NetBSD 3.1
- NetBSD NetBSD 4.0
Reported:
Aug 26, 2008
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For corrections or additions please email xforce@iss.net
* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.