Bugzilla – Attachment 3316 Details for
Bug 2929
OpenSSH server should not send the SSH_MSG_EXT_INFO message after rekeying
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[patch]
check KEX_INITIAL before sending ext-info
bz2929.diff (text/plain), 794 bytes, created by
Damien Miller
on 2019-09-04 09:27:42 AEST
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Description:
check KEX_INITIAL before sending ext-info
Filename:
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Creator:
Damien Miller
Created:
2019-09-04 09:27:42 AEST
Size:
794 bytes
patch
obsolete
>diff --git a/kex.c b/kex.c >index 374b827..60e9b5d 100644 >--- a/kex.c >+++ b/kex.c >@@ -398,6 +398,7 @@ kex_send_ext_info(struct ssh *ssh) > int r; > char *algs; > >+ debug("Sending SSH2_MSG_EXT_INFO"); > if ((algs = sshkey_alg_list(0, 1, 1, ',')) == NULL) > return SSH_ERR_ALLOC_FAIL; > /* XXX filter algs list by allowed pubkey/hostbased types */ >@@ -424,11 +425,11 @@ kex_send_newkeys(struct ssh *ssh) > (r = sshpkt_send(ssh)) != 0) > return r; > debug("SSH2_MSG_NEWKEYS sent"); >- debug("expecting SSH2_MSG_NEWKEYS"); > ssh_dispatch_set(ssh, SSH2_MSG_NEWKEYS, &kex_input_newkeys); >- if (ssh->kex->ext_info_c) >+ if (ssh->kex->ext_info_c && (ssh->kex->flags & KEX_INITIAL) != 0) > if ((r = kex_send_ext_info(ssh)) != 0) > return r; >+ debug("expecting SSH2_MSG_NEWKEYS"); > return 0; > } >
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