Date: Sat, 31 Jan 1998 18:58:55 GMT From: njs3@doc.ic.ac.uk To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: kern/5611: bind does not check sockaddr.sin_family corresponds to socket type Message-ID: <199801311858.SAA00642@sprite65.doc.ic.ac.uk>
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>Number: 5611
>Category: kern
>Synopsis: bind does not check sockaddr->sin_family corresponds to socket type
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Jan 31 11:10:00 PST 1998
>Last-Modified:
>Originator: Niall Smart
>Organization:
>Release: FreeBSD 3.0-971225-SNAP i386
>Environment:
>Description:
the bind() syscall does not check that the sin_family member of the
sockaddr passed is appropriate for the type of socket that the bind
is being applied to
>How-To-Repeat:
struct sockaddr_in sin;
int fd;
if ( (fd = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
perror("socket");
exit(1);
}
bzero(&sin, sizeof(sin));
sin.sin_port = htons(3456);
sin.sin_family = AF_UNIX;
sin.sin_addr.s_addr = htonl(INADDR_ANY);
if (bind(fd, (struct sockaddr*) &sin, sizeof(sin)) < 0) {
perror("bind");
exit(1);
}
The above code executes successfully, however bind should return -1
because sin.sin_family is AF_UNIX, not AF_INET.
>Fix:
>Audit-Trail:
>Unformatted:
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