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| author | Ivan Skytte Jorgensen <isj-sctp@i1.dk> | 2005-10-28 15:39:02 -0700 |
|---|---|---|
| committer | Sridhar Samudrala <sri@us.ibm.com> | 2005-10-28 15:39:02 -0700 |
| commit | 64a0c1c81e300f0f56f26604c81040784e3717f0 (patch) | |
| tree | 845863e5b3fc06a9de54104f32e28bbe914ee44a | |
| parent | 96a339985d4c6874d32909e8f1903e6e6c141399 (diff) | |
| download | linux-3.10-64a0c1c81e300f0f56f26604c81040784e3717f0.tar.gz linux-3.10-64a0c1c81e300f0f56f26604c81040784e3717f0.tar.bz2 linux-3.10-64a0c1c81e300f0f56f26604c81040784e3717f0.zip | |
[SCTP] Do not allow unprivileged programs initiating new associations on
privileged ports.
Signed-off-by: Ivan Skytte Jorgensen <isj-sctp@i1.dk>
Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
| -rw-r--r-- | net/sctp/socket.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 97b556c1c45..b529af5e6f2 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -1010,6 +1010,19 @@ static int __sctp_connect(struct sock* sk, err = -EAGAIN; goto out_free; } + } else { + /* + * If an unprivileged user inherits a 1-many + * style socket with open associations on a + * privileged port, it MAY be permitted to + * accept new associations, but it SHOULD NOT + * be permitted to open new associations. + */ + if (ep->base.bind_addr.port < PROT_SOCK && + !capable(CAP_NET_BIND_SERVICE)) { + err = -EACCES; + goto out_free; + } } scope = sctp_scope(&to); @@ -1515,6 +1528,19 @@ SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk, err = -EAGAIN; goto out_unlock; } + } else { + /* + * If an unprivileged user inherits a one-to-many + * style socket with open associations on a privileged + * port, it MAY be permitted to accept new associations, + * but it SHOULD NOT be permitted to open new + * associations. + */ + if (ep->base.bind_addr.port < PROT_SOCK && + !capable(CAP_NET_BIND_SERVICE)) { + err = -EACCES; + goto out_unlock; + } } scope = sctp_scope(&to); |