Bug 1688081
| Summary: | curl sftp only supports up to insecure sha1 kex/mac | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Chris Cheney <ccheney> |
| Component: | curl | Assignee: | Kamil Dudka <kdudka> |
| Status: | CLOSED DUPLICATE | QA Contact: | Daniel Rusek <drusek> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.6 | CC: | kdudka |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | All | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2019-03-13 11:55:56 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
(In reply to Chris Cheney from comment #0) > ** This BZ should probably be cloned to RHEL 6. ** It is too late to fix this in RHEL-6 unfortunately. > Current curl upstream works without problem. > > So a rebase or backport of the change should resolve the problem. This is not about the version of curl but the version of libssh2, which is the library that implements the SSH layer for (lib)curl. I believe that this is bug going to be fixed by the planned rebase of libssh2 to 1.8.0 (bug #1592784). *** This bug has been marked as a duplicate of bug 1592784 *** |
Description of problem: ** This BZ should probably be cloned to RHEL 6. ** If you disable sha-1 KEX/MACs in openssh then sftp is no longer able to connect on both RHEL 6 and 7. curl only supports the following: KEX algorithms: diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 [preauth] MACs ctos: hmac-sha1,hmac-sha1-96,hmac-md5,hmac-md5-96,hmac-ripemd160,hmac-ripemd160 [preauth] openssh after removing sha-1: KEX algorithms: curve25519-sha256,curve25519-sha256,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256 [preauth] MACs ctos: umac-64-etm,umac-128-etm,hmac-sha2-256-etm,hmac-sha2-512-etm,umac-64,umac-128,hmac-sha2-256,hmac-sha2-512 [preauth] Version-Release number of selected component (if applicable): curl-7.29.0-51.el7.x86_64 openssh-7.4p1-16.el7.x86_64 How reproducible: Easily see steps to reproduce. Steps to Reproduce: 1. edit /etc/ssh/sshd_config KexAlgorithms curve25519-sha256,curve25519-sha256,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256 MACs umac-64-etm,umac-128-etm,hmac-sha2-256-etm,hmac-sha2-512-etm,umac-64,umac-128,hmac-sha2-256,hmac-sha2-512 2. Attempt to use curl to sftp file 3. Fails to connect Actual results: Fails to connect Expected results: Should use a secure KEX/MACs. Additional info: Current curl upstream works without problem. So a rebase or backport of the change should resolve the problem.