[lkml]   [2000]   [Nov]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Subject2.2.x BUG & PATCH: recvmsg() does not check msg_controllen correctly
I found this in all 2.2.x kernels, and it might possibly be present in
2.4.x too...

When receiving file descriptors via recvmsg(), scm_detach_fds() in
net/core/scm.c can overflow user space data at msg_control if
msg_controllen is less than sizeof(struct cmsghdr).

This is a security problem.

Attached is a patch to fix the problem and a little program to
demonstrate the problem.

[unhandled content-type:application/octet-stream][unhandled content-type:application/octet-stream]
 \ /
  Last update: 2005-03-22 12:45    [W:0.261 / U:0.620 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site