Note: This bug is displayed in read-only format because
the product is no longer active in Red Hat Bugzilla.
RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Description of problem:
When NSS client does not recognise hashes in Certificate Request (e.g. when they are MD5 only) it signs the Certificate Verify with SHA-1.
This is non compliance with a RFC 5246 MUST clause:
The hash and signature algorithms used in the signature MUST be
one of those present in the supported_signature_algorithms field
of the CertificateRequest message.
Version-Release number of selected component (if applicable):
nss-3.34.0-0.1.beta1.el7.x86_64
How reproducible:
Always
Steps to Reproduce:
1. setup server asking for just md-5 in Certificate Request
2. connect to it with NSS
Actual results:
server side:
Generated alert: decryption_failed: Invalid signature on Certificate Verify
client side:
tstclnt: read from socket failed: SSL_ERROR_DECRYPTION_FAILED_ALERT: Peer was unable to decrypt an SSL record it received.
Expected results:
early connection abort with handshake_failure
Additional info:
This is a regression compared to nss-3.28.4-8.el7.x86_64 that version was behaving correctly.
This issue was not selected to be included either in Red Hat Enterprise Linux 7.7 because it is seen either as low or moderate impact to a small amount of use-cases. The next release will be in Maintenance Support 1 Phase, which means that qualified Critical and Important Security errata advisories (RHSAs) and Urgent Priority Bug Fix errata advisories (RHBAs) may be released as they become available. We will now close this issue, but if you believe that it qualifies for the Maintenance Support 1 Phase, please re-open; otherwise we recommend moving the request to Red Hat Enterprise Linux 8 if applicable.
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, 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/RHSA-2019:2237
Description of problem: When NSS client does not recognise hashes in Certificate Request (e.g. when they are MD5 only) it signs the Certificate Verify with SHA-1. This is non compliance with a RFC 5246 MUST clause: The hash and signature algorithms used in the signature MUST be one of those present in the supported_signature_algorithms field of the CertificateRequest message. Version-Release number of selected component (if applicable): nss-3.34.0-0.1.beta1.el7.x86_64 How reproducible: Always Steps to Reproduce: 1. setup server asking for just md-5 in Certificate Request 2. connect to it with NSS Actual results: server side: Generated alert: decryption_failed: Invalid signature on Certificate Verify client side: tstclnt: read from socket failed: SSL_ERROR_DECRYPTION_FAILED_ALERT: Peer was unable to decrypt an SSL record it received. Expected results: early connection abort with handshake_failure Additional info: This is a regression compared to nss-3.28.4-8.el7.x86_64 that version was behaving correctly.