BSD PPP link control protocol (LCP) buffer overflow
| bsd-ppp-lcp-bo (28562) |  Low Risk |
Description:
The Point-to-Point Protocol (PPP) in multiple BSD distributions is vulnerable to a denial of service, caused by a buffer overflow. By sending specially-crafted Link Control Protocol (LCP) packet containing invalid configuration options, a remote attacker could overflow a buffer and cause the BSD kernel to panic.
*CVSS:
| Base Score: | 5 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Complete |
| Temporal Score: | 3.7 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
FreeBSD:
Refer to FreeBSD Security Advisory FreeBSD-SA-06:08.ppp for patch, upgrade, or suggested workaround information. See References.
NetBSD:
Refer to NetBSD Security Advisory 2006-019 for patch, upgrade or suggested workaround information. See References.
References:
- FreeBSD-SA-06:08.ppp : Buffer overflow in ppp(4).
- NetBSD-SA2006-019: Malicious PPP options can overrun a kernel buffer.
- BID-19684: NetBSD In-Kernel PPP Multiple Buffer Overflow Vulnerabilities
- CVE-2006-4304: Buffer overflow in the sppp driver in FreeBSD 4.11 through 6.1, NetBSD 2.0 through 4.0 beta before 20060823, and OpenBSD 3.8 and 3.9 before 20060902 allows remote attackers to cause a denial of service (panic), obtain sensitive information, and possibly execute arbitrary code via crafted Link Control Protocol (LCP) packets with an option length that exceeds the overall length, which triggers the overflow in (1) pppoe and (2) ippp. NOTE: this issue was originally incorrectly reported for the ppp driver.
- SA21587: FreeBSD "sppp" Buffer Overflow Vulnerability
- SECTRACK ID: 1016745: BSD UNIX PPP LCP Options Length Buffer Overflow Lets Remote Users Deny Service
Platforms Affected:
- FreeBSD FreeBSD
- NetBSD NetBSD 2.0
- NetBSD NetBSD 2.0.1
- NetBSD NetBSD 2.0.2
- NetBSD NetBSD 2.0.3
- NetBSD NetBSD 2.0.4
- NetBSD NetBSD 2.1
- NetBSD NetBSD 3.0
- NetBSD NetBSD 3.0.1
- NetBSD NetBSD 3.0.2
- NetBSD NetBSD 3.1 rc1
- NetBSD NetBSD 4.0 beta
Reported:
Aug 23, 2006
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 the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
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.