Bug 1954809 (CVE-2019-25031) - CVE-2019-25031 unbound: configuration injection in create_unbound_ad_servers.sh upon a successful man-in-the-middle attack against a cleartext HTTP session
Summary: CVE-2019-25031 unbound: configuration injection in create_unbound_ad_servers....
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2019-25031
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1954811
TreeView+ depends on / blocked
 
Reported: 2021-04-28 19:20 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-05-06 14:33 UTC (History)
5 users (show)

Fixed In Version: unbound 1.9.6
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in unbound. The create_unbound_ad_servers.sh bash script does not properly sanitize input data, which is retrieved using an unencrypted, unauthenticated HTTP request, before writing the configuration file allowing a man-in-the-middle attack. The highest threat from this vulnerability is to data integrity and system availability.
Clone Of:
Environment:
Last Closed: 2021-05-06 14:33:51 UTC
Embargoed:

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Description Guilherme de Almeida Suckevicz 2021-04-28 19:20:40 UTC 
Unbound before 1.9.5 allows configuration injection in create_unbound_ad_servers.sh upon a successful man-in-the-middle attack against a cleartext HTTP session.

Reference:
https://ostif.org/our-audit-of-unbound-dns-by-x41-d-sec-full-results/
Comment 1 Paul Wouters 2021-04-28 20:46:36 UTC 
what is the point of creating these old issues?
Comment 2 Eric Christensen 2021-04-29 14:00:19 UTC 
External References:

https://ostif.org/our-audit-of-unbound-dns-by-x41-d-sec-full-results/
Comment 3 Riccardo Schirone 2021-05-06 13:15:51 UTC 
In reply to comment #1:
> what is the point of creating these old issues?

As said elsewhere, these are about the flaws in general, so not really specific to Fedora.
That said... I agree these were probably not necessary because all these issues were part of an audit report that is very old and together with the author of the audit (x41) and NLNet Labs (CNA for Unbound) we chose to not consider these CVE-worthy. Reason for that was that most of these old issues could not really be triggered during regular usage and were more of an hardening than real vulnerabilities.

Apparently someone assigned CVEs to these issues anyway, one year later. NLNet Labs has been notified of these CVEs and we'll see what they want to do with these.
Comment 4 Riccardo Schirone 2021-05-06 13:17:09 UTC 
Upstream patch:
https://github.com/NLnetLabs/unbound/commit/f887552763477a606a9608b0f6b498685e0f6587
Comment 5 Riccardo Schirone 2021-05-06 13:26:26 UTC 
Statement:

This issue did not affect the versions of unbound as shipped with Red Hat Enterprise Linux 7, and 8 as they did not include the vulnerable script create_unbound_ad_servers.sh.
Comment 6 Product Security DevOps Team 2021-05-06 14:33:51 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-25031
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