diff options
| author | Günther Deschner <gd@samba.org> | 2018-03-13 16:56:20 +0100 |
|---|---|---|
| committer | Karolin Seeger <kseeger@samba.org> | 2018-08-11 08:16:03 +0200 |
| commit | a5245e464d710ecb41c759d04ae1c762fbd8d2e9 (patch) | |
| tree | e2c4c180067ce8598f60f23a22a7410cd92f68d1 | |
| parent | 6993f39d20de0944c557336a99ac8e63551c808c (diff) | |
| download | samba-a5245e464d710ecb41c759d04ae1c762fbd8d2e9.tar.gz | |
CVE-2018-1139 libcli/auth: Do not allow ntlmv1 over SMB1 when it is disabled via "ntlm auth".
This fixes a regression that came in via 00db3aba6cf9ebaafdf39ee2f9c7ba5ec2281ea0.
Found by Vivek Das <vdas@redhat.com> (Red Hat QE).
In order to demonstrate simply run:
smbclient //server/share -U user%password -mNT1 -c quit \
--option="client ntlmv2 auth"=no \
--option="client use spnego"=no
against a server that uses "ntlm auth = ntlmv2-only" (our default
setting).
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13360
CVE-2018-1139: Weak authentication protocol allowed.
Guenther
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Guenther Deschner <gd@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
| -rw-r--r-- | libcli/auth/ntlm_check.c | 2 | ||||
| -rw-r--r-- | selftest/knownfail | 3 | ||||
| -rw-r--r-- | selftest/knownfail.d/ntlm | 2 |
3 files changed, 3 insertions, 4 deletions
diff --git a/libcli/auth/ntlm_check.c b/libcli/auth/ntlm_check.c index 1c6499bd210..b68e9c87888 100644 --- a/libcli/auth/ntlm_check.c +++ b/libcli/auth/ntlm_check.c @@ -572,7 +572,7 @@ NTSTATUS ntlm_password_check(TALLOC_CTX *mem_ctx, - I think this is related to Win9X pass-though authentication */ DEBUG(4,("ntlm_password_check: Checking NT MD4 password in LM field\n")); - if (ntlm_auth) { + if (ntlm_auth == NTLM_AUTH_ON) { if (smb_pwd_check_ntlmv1(mem_ctx, lm_response, stored_nt->hash, challenge, diff --git a/selftest/knownfail b/selftest/knownfail index eaddaece25c..5790f4c205c 100644 --- a/selftest/knownfail +++ b/selftest/knownfail @@ -300,8 +300,9 @@ ^samba4.smb.signing.*disabled.*signing=off.*\(ad_dc\) # fl2000dc doesn't support AES ^samba4.krb5.kdc.*as-req-aes.*fl2000dc -# nt4_member and ad_member don't support ntlmv1 +# nt4_member and ad_member don't support ntlmv1 (not even over SMB1) ^samba3.blackbox.smbclient_auth.plain.*_member.*option=clientntlmv2auth=no.member.creds.*as.user +^samba3.blackbox.smbclient_auth.plain.*_member.*option=clientntlmv2auth=no.*mNT1.member.creds.*as.user #nt-vfs server blocks read with execute access ^samba4.smb2.read.access #ntvfs server blocks copychunk with execute access on read handle diff --git a/selftest/knownfail.d/ntlm b/selftest/knownfail.d/ntlm deleted file mode 100644 index c6e6a3739ba..00000000000 --- a/selftest/knownfail.d/ntlm +++ /dev/null @@ -1,2 +0,0 @@ -^samba.unittests.ntlm_check.test_ntlm_mschapv2_only_denied -^samba.unittests.ntlm_check.test_ntlmv2_only_ntlm\( |