CVE Catalog

CVE-2006-4304

High
Published: Translated: NVD NIST

Summary

Buffer overflow vulnerability in the sppp driver in FreeBSD, NetBSD, and OpenBSD. A remote attacker can send crafted Link Control Protocol (LCP) packets with an option length exceeding the overall length, triggering the overflow. This leads to a kernel panic (denial of service), sensitive information disclosure, and possibly arbitrary code execution.

Risk Assessment

Organizations using vulnerable versions of FreeBSD, NetBSD, or OpenBSD are exposed to remote attacks causing service unavailability, data leakage, or system compromise. The vulnerability affects PPPoE and ippp interfaces, which may be used in network infrastructure.

Recommendation

Immediately update FreeBSD, NetBSD, and OpenBSD systems to versions containing the fix (FreeBSD after 6.1, NetBSD 4.0 beta after 20060823, OpenBSD after 20060902). Until patching, restrict access to PPPoE/ippp services or disable them if not required.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS