| commit | bc6bcb59dd7c184d229f9e86d08aa56059938a4c | [log] [tgz] |
|---|---|---|
| author | Pablo Neira Ayuso <pablo@netfilter.org> | Tue May 07 03:22:18 2013 +0200 |
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | Thu May 16 17:35:53 2013 +0200 |
| tree | 1305eb74bb354d76cc815910a3ebe1f803b7a6f4 | |
| parent | 8cdb46da06ea94543a3b2e53e3e92736421d1093 [diff] |
netfilter: xt_TCPOPTSTRIP: fix possible mangling beyond packet boundary This target assumes that tcph->doff is well-formed, that may be well not the case. Add extra sanity checkings to avoid possible crash due to read/write out of the real packet boundary. After this patch, the default action on malformed TCP packets is to drop them. Moreover, fragments are skipped. Reported-by: Rafal Kupka <rkupka@telemetry.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>