Bug 1954780 (CVE-2019-25035) - CVE-2019-25035 unbound: out-of-bounds write in sldns_bget_token_par
Summary: CVE-2019-25035 unbound: out-of-bounds write in sldns_bget_token_par
Alias: CVE-2019-25035
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1859933 1968662 1968663 1968664
Blocks: 1954811
TreeView+ depends on / blocked
Reported: 2021-04-28 18:44 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 out-of-bounds write in the sldns_bget_token_par function may be abused by a remote attacker. The highest threat from this vulnerability is to data confidentiality and integrity as well as service availability.
Clone Of:
Last Closed: 2021-05-18 20:39:00 UTC

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2022:0632 0 None None None 2022-02-22 15:13:38 UTC

Description Guilherme de Almeida Suckevicz 2021-04-28 18:44:09 UTC
Unbound before 1.9.5 allows an out-of-bounds write in sldns_bget_token_par.


Comment 3 Riccardo Schirone 2021-05-06 14:52:12 UTC

There is no available reproducer or proof of concept for this issue, nor it was ever proven the out-of-bounds write 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 5 errata-xmlrpc 2021-05-18 15:37:36 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 20:39:00 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):


Comment 8 errata-xmlrpc 2022-02-22 15:13:36 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

Note You need to log in before you can comment on or make changes to this bug.