Bug 1954801 (CVE-2019-25041) - CVE-2019-25041 unbound: assertion failure via a compressed name in dname_pkt_copy
Summary: CVE-2019-25041 unbound: assertion failure via a compressed name in dname_pkt_...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-25041
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1859933 1968662 1968663 1968664
Blocks: 1954811
TreeView+ depends on / blocked
 
Reported: 2021-04-28 19:10 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-09-23 18:22 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. A reachable assertion in the dname_pkt_copy function can be triggered through compressed names. The highest threat from this vulnerability is to service availability.
Clone Of:
Environment:
Last Closed: 2021-05-18 20:39:18 UTC
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2022:0632 0 None None None 2022-02-22 15:14:02 UTC

Description Guilherme de Almeida Suckevicz 2021-04-28 19:10:39 UTC 
Unbound before 1.9.5 allows an assertion failure via a compressed name in dname_pkt_copy.

Reference:
https://ostif.org/our-audit-of-unbound-dns-by-x41-d-sec-full-results/
Comment 1 Riccardo Schirone 2021-05-06 13:00:26 UTC 
Upstream patch:
https://github.com/NLnetLabs/unbound/commit/2d444a5037acff6024630b88092d9188f2f5d8fe
Comment 3 Riccardo Schirone 2021-05-06 14:56:36 UTC 
Statement:

According to the original report there are checks happening before the affected function that make this not exploitable. For these reasons its Impact is Moderate.
Comment 5 errata-xmlrpc 2021-05-18 15:37:52 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:1853 https://access.redhat.com/errata/RHSA-2021:1853
Comment 6 Product Security DevOps Team 2021-05-18 20:39:18 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-2019-25041
Comment 8 errata-xmlrpc 2022-02-22 15:14:00 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2022:0632 https://access.redhat.com/errata/RHSA-2022:0632
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