Bug 1444136

Summary: move NSS signtool to the unsupported tools in RHEL 7.6
Product: Red Hat Enterprise Linux 7 Reporter: Hubert Kario <hkario>
Component: nssAssignee: Daiki Ueno <dueno>
Status: CLOSED ERRATA QA Contact: Ondrej Moriš <omoris>
Severity: medium Docs Contact: Mirek Jahoda <mjahoda>
Priority: low    
Version: 7.4CC: dueno, hkario, lmiksik, mjahoda, nmavrogi, omoris, qe-baseos-security, szidek, tmraz
Target Milestone: rcKeywords: Reopened, Triaged
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: nss-3.43.0-3.el7 Doc Type: Deprecated Functionality
Doc Text:
.`signtool` has been deprecated and moved to unsupported-tools The `signtool` tool from the `nss` packages, which uses insecure signature algorithms, has been deprecated. The signtool executable has been moved to the `/usr/lib64/nss/unsupported-tools/` or `/usr/lib/nss/unsupported-tools/` directory, depending on the platform.
Story Points: ---
Clone Of: 1309781 Environment:
Last Closed: 2019-08-06 13:08:26 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:
Bug Depends On: 1309781    
Bug Blocks: 1645231    

Description Hubert Kario 2017-04-20 16:02:58 UTC
Description of problem:
SHA1 was published in 1993 and is still in wide use today. However there are several weaknesses and the algorithms is considered today cryptographically broken (less effort than brute force is required). It is highly likely we will have collision attacks in the near future; i.e., forged certificates. For that it is recommended for our tools which deal with digital signatures to no longer use the SHA1 as a hash function by default.

For maximum compatibility with old software we recommend the SHA2-256 algorithm to be used as the default replacement.

As such, it is recommended for all of the included in NSS tools and shipped configuration files, to switch from SHA1 to SHA2-256 when generating certificates or digital signatures.

Comment 7 Kai Engert (:kaie) (inactive account) 2017-09-01 12:04:41 UTC
I suggest the following:

In RHEL 7.5, we announce in release notes that signtool is deprecated.
I've filed bug 1487613 for that purpose.

In RHEL 7.6, we'll move signtool to the unsupported directory.
I'm changing this bug to that purpose and target.

Comment 14 Simo Sorce 2019-02-11 15:41:39 UTC
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.

Comment 23 errata-xmlrpc 2019-08-06 13:08:26 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, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.