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Bug 2085088 - Incomplete filtering of ciphersuites in FIPS mode
Summary: Incomplete filtering of ciphersuites in FIPS mode
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: openssl
Version: 9.0
Hardware: Unspecified
OS: Unspecified
Target Milestone: rc
: ---
Assignee: Dmitry Belyavskiy
QA Contact: Hubert Kario
Depends On:
Blocks: 2091994
TreeView+ depends on / blocked
Reported: 2022-05-12 19:02 UTC by Hubert Kario
Modified: 2023-06-05 16:10 UTC (History)
3 users (show)

Fixed In Version: openssl-3.0.1-43.el9_0
Doc Type: No Doc Update
Doc Text:
Clone Of:
: 2091994 (view as bug list)
Last Closed: 2023-06-05 16:10:05 UTC
Type: Bug
Target Upstream Version:

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker CRYPTO-7249 0 None None None 2022-05-17 11:49:00 UTC
Red Hat Issue Tracker RHELPLAN-121912 0 None None None 2022-05-12 19:09:42 UTC

Description Hubert Kario 2022-05-12 19:02:39 UTC
Description of problem:
When OpenSSL is working in FIPS mode, the cipher selection process (which ciphers can actually be used) is incomplete. When openssl is configured with ciphersuites like DHE-RSA-ARIA128-GCM-SHA256 it correctly aborts with a "no cipher match" error, as there are no ciphers usable for TLS 1.2.
If instead it's started with kRSA as the cipherstring, it will not abort, and it will actually attempt a connection, but the operation will fail on client side, with it sending an internal_error alert instead of ClientKeyExchange.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. openssl req -x509 -newkey rsa -keyout localhost.key -out localhost.crt -subj /CN=localhost -nodes -batch
2. openssl s_server -key localhost.key -cert localhost.crt -cipher kRSA -www &> server.log &
3. openssl s_client -tls1_2 -cipher kRSA

Actual results:
C0B11677537F0000:error:1C8000A5:Provider routines:rsa_encrypt:illegal or unsupported padding mode:providers/implementations/asymciphers/rsa_enc.c:157:
C0B11677537F0000:error:0A080006:SSL routines:tls_construct_cke_rsa:EVP lib:ssl/statem/statem_clnt.c:2863:

C081DE4ED37F0000:error:0A000438:SSL routines:ssl3_read_bytes:tlsv1 alert internal error:ssl/record/rec_layer_s3.c:1584:SSL alert number 80

Expected results:
the server should not start with the -cipher kRSA option, it should abort with a  
C0F1676C707F0000:error:0A0000B9:SSL routines:SSL_CTX_set_cipher_list:no cipher match:ssl/ssl_lib.c:2731:

Additional info:
CCM8 ciphersuites aren't rejected at all

Comment 1 Dmitry Belyavskiy 2022-05-18 13:59:43 UTC
kRSA shouldn't be chosen by server in FIPS mode.

Comment 9 Clemens Lang 2023-06-05 16:10:05 UTC
RHEL 9.1 contains openssl-3.0.1-43.el9_0.

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