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Do not follow symlinks when binding a unix domain socket.

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This fixes the ssh 1.2.27 vulnerability as reported in bugtraq.
This commit is contained in:
Guido van Rooij 1999-09-29 21:09:41 +00:00
parent 7256d29cc4
commit 974784e8b4
1 changed files with 1 additions and 1 deletions
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2
sys/kern/uipc_usrreq.c
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@ -548,7 +548,7 @@ unp_bind(unp, nam, p)
return EINVAL;
strncpy(buf, soun->sun_path, namelen);
buf[namelen] = 0; /* null-terminate the string */
NDINIT(&nd, CREATE, FOLLOW | LOCKPARENT, UIO_SYSSPACE,
NDINIT(&nd, CREATE, NOFOLLOW | LOCKPARENT, UIO_SYSSPACE,
buf, p);
/* SHOULD BE ABLE TO ADOPT EXISTING AND wakeup() ALA FIFO's */
error = namei(&nd);