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Description of problem:
Crypto-policy non-compliance is reported by rpmlint.
Since RHEL-8.0 we have system-wide crypto policies - usage of cryptographic protocols such as TLS that are enforced system-wide. In general we want all applications in RHEL to be compliant with the crypto policy set on the system (see policy [1] inherited from Fedora).
Rpmlint detected that tog-pegasus-libs uses SSL_CTX_set_cipher_list from OpenSSL library without PROFILE=SYSTEM. This indicates that a custom setting is used rather than system-wide crypto-policies setting. It is not a problem as long as it is intentional (e.g. specific algorithm is requested by user or configuration). However, unintentional usage might be a potential bug.
Could you please inspect relevant parts of the code, check that this is not rpmlint false positive and verify that custom setting is used intentionally?
* If yes, feel free to close this BZ as NOT-A-BUG.
* If not, could you please consider using system-wide crypto policy setting (PROFILE=SYSTEM) instead of custom setting?
[1] https://docs.fedoraproject.org/en-US/packaging-guidelines/CryptoPolicies
Version-Release number of selected component (if applicable):
tog-pegasus-2.14.1-45.el8
How reproducible:
100%
Steps to Reproduce:
1. rpmlint tog-pegasus-libs-2.14.1-45.el8.x86_64.rpm
Expected results:
No crypto-policy-non-compliance warning.
Actual results:
tog-pegasus-libs.x86_64: W: crypto-policy-non-compliance-openssl /usr/lib64/libpegcommon.so.1 SSL_CTX_set_cipher_list
Comment 1Vitezslav Crhonek
2020-06-24 08:35:14 UTC
pegasus/src/Pegasus/Common/SSLContext.cpp:
...
if (_cipherSuite.size() != 0)
{
if (!(SSL_CTX_set_cipher_list(sslContext, _cipherSuite.getCString())))
{
...
This is the place where SSL_CTX_set_cipher_list function is called. _cipherSuite value
is taken from cimserver's sslCipherSuite option. Users can change the option, but there's
default value used if they don't:
# cimconfig -g sslCipherSuite
Current value: DEFAULT
(For more information see man cimconfig.)
Should the default sslCipherSuite value be changed to 'PROFILE=SYSTEM' instead of 'DEFAULT'
to be compliant with the crypto policy?
DEFAULT is openssl built-in value different from PROFILE=SYSTEM and hence, yes, I believe that needs to be corrected. If sysadmin changes the system policy, DEFAULT value of openssl doesn't reflect that change and that might potentially cause problems for TLS connection.
Comment 3Vitezslav Crhonek
2020-06-24 08:51:48 UTC
Verified with tog-pegasus-2.14.1-46.el8. Even though rpmlint reports still reports the same issue:
# rpmlint tog-pegasus-libs-2.14.1-46.el8.i686.rpm 2>&1 | grep crypto-policy-non-compliance
tog-pegasus-libs.i686: W: crypto-policy-non-compliance-openssl /usr/lib/libpegcommon.so.1 SSL_CTX_set_cipher_list
it is not false positive. As noted above, SSL_CTX_set_cipher_list is parametrized in this case and default options was updated from DEFAULT to PROFILE=SYSTEM and hence if there is no custom setting, crypto-policies setting is used.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (tog-pegasus bug fix and enhancement update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2020:4678