sppp -- buffer overflow vulnerability

2006-08-23T00:00:00
ID C9D2E361-32FB-11DB-A6E2-000E0C2E438A
Type freebsd
Reporter FreeBSD
Modified 2006-08-30T00:00:00

Description

Problem Description While processing Link Control Protocol (LCP) configuration options received from the remote host, sppp(4) fails to correctly validate option lengths. This may result in data being read or written beyond the allocated kernel memory buffer. Impact An attacker able to send LCP packets, including the remote end of a sppp(4) connection, can cause the FreeBSD kernel to panic. Such an attacker may also be able to obtain sensitive information or gain elevated privileges. Workaround No workaround is available, but systems which do not use sppp(4) are not vulnerable.