Bug 1954772 (CVE-2019-25032) - CVE-2019-25032 unbound: integer overflow in the regional allocator via regional_alloc
Summary: CVE-2019-25032 unbound: integer overflow in the regional allocator via region...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-25032
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 18:35 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. An integer overflow in regional_alloc function may lead to a buffer overflow of the allocated buffer if the size can be controlled by an attacker and can be big enough. The highest threat from this vulnerability is to data confidentiality and integrity as well as service availability.
Clone Of:
Environment:
Last Closed: 2021-05-18 20:38:54 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2022:0632 0 None None None 2022-02-22 15:13:30 UTC

Description Guilherme de Almeida Suckevicz 2021-04-28 18:35:20 UTC 
Unbound before 1.9.5 allows an integer overflow in the regional allocator via regional_alloc.

Reference:
https://ostif.org/our-audit-of-unbound-dns-by-x41-d-sec-full-results/
Comment 1 Paul Wouters 2021-04-28 20:45:29 UTC 
please close, this is also an old issue.
Comment 2 Riccardo Schirone 2021-04-29 08:14:50 UTC 
Hi Paul, please note these are bugs created to keep track of flaws in Fedora/RHEL projects/products, not related to Fedora only. We usually create additional bugs for Fedora maintainers to let them know about issues in their components, but in these cases they were not created, so there is nothing else for you to do, because as you said these issues are already fixed in supported Fedora versions (I see Fedora 32 has 1.10.1, so that's alright).
Comment 3 Riccardo Schirone 2021-05-06 10:19:20 UTC 
Upstream patch:
https://github.com/NLnetLabs/unbound/commit/226298bbd36f1f0fd9608e98c2ae85988b7bbdb8
Comment 6 Riccardo Schirone 2021-05-06 14:48:57 UTC 
Statement:

There is no available reproducer or proof of concept for this issue, nor it was ever proven the buffer overflow can happen in practice. Indeed in the original report this issue was considered one that might not be triggered and for this reason its Impact is Moderate.
Comment 8 errata-xmlrpc 2021-05-18 15:37:35 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 9 Product Security DevOps Team 2021-05-18 20:38:54 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-2019-25032
Comment 11 errata-xmlrpc 2022-02-22 15:13:28 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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