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Bug 1832844 - mod_md does not work with ACME server that does not provide keyChange or revokeCert resources
Summary: mod_md does not work with ACME server that does not provide keyChange or revo...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: mod_md
Version: 8.2
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: 8.0
Assignee: Luboš Uhliarik
QA Contact: Branislav Náter
URL:
Whiteboard:
Depends On: 1832841
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-05-07 11:22 UTC by Fraser Tweedale
Modified: 2020-12-14 13:16 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 1832841
Environment:
Last Closed: 2020-11-04 03:35:13 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Fraser Tweedale 2020-05-07 11:22:28 UTC 
+++ This bug was initially created as a clone of Bug #1832841 +++

Problem and fix description per below commit message.
Upstream PR was already merged; commit is:
https://github.com/icing/mod_md/commit/38ff597f3ccb3c942e68701fb185c6a68f0708e4


RFC 8555 §7.1 states:

  The server MUST provide "directory" and "newNonce" resources.

But RFC 8555 makes no explicit statement anywhere whether other
resources are, or are not, required (with the exception of
"newAuthz" which is optional).

Therefore it is possible that some ACME server implementations may
omit some resources; in particular those that are not an essential
part of the "order" workflow.  Indeed, I am working with one such
server implementation, which does not at this time implement
"keyChange".  mod_md refuses to interact with this server because it
is checking that a certain set of resources are defined in the
directory object - despite some of those resources not currently
being used.

Update the check to require only "newNonce", "newAccount" and
"newOrder".  Omit from the check and therefore tolerate the absense
of resources which are not always required: "revokeCert" and
"keyChange".

If mod_md implements revocation and/or key rollover in the future,
the availability of those features should be predicated on the
server's advertised capabilities.
Comment 16 errata-xmlrpc 2020-11-04 03:35:13 UTC 
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 (Moderate: httpd:2.4 security, 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/RHSA-2020:4751
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