From e66460b8942afc349793d018627b403bbd4eaad0 Mon Sep 17 00:00:00 2001 From: cperciva Date: Wed, 22 Mar 2006 16:00:42 +0000 Subject: Add missing code needed for the detection of IPSec packet replays. [1] Correctly identify the user running opiepasswd(1) when the login name differs from the account name. [2] Security: FreeBSD-SA-06:11.ipsec [1] Security: FreeBSD-SA-06:12.opie [2] --- sys/netipsec/xform_esp.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'sys/netipsec/xform_esp.c') diff --git a/sys/netipsec/xform_esp.c b/sys/netipsec/xform_esp.c index fdcee7f..d9c013b 100644 --- a/sys/netipsec/xform_esp.c +++ b/sys/netipsec/xform_esp.c @@ -555,6 +555,23 @@ esp_input_cb(struct cryptop *crp) */ m->m_flags |= M_DECRYPTED; + /* + * Update replay sequence number, if appropriate. + */ + if (sav->replay) { + u_int32_t seq; + + m_copydata(m, skip + offsetof(struct newesp, esp_seq), + sizeof (seq), (caddr_t) &seq); + if (ipsec_updatereplay(ntohl(seq), sav)) { + DPRINTF(("%s: packet replay check for %s\n", __func__, + ipsec_logsastr(sav))); + espstat.esps_replay++; + error = ENOBUFS; + goto bad; + } + } + /* Determine the ESP header length */ if (sav->flags & SADB_X_EXT_OLD) hlen = sizeof (struct esp) + sav->ivlen; -- cgit v1.1