CVE-2020-10772
First published: Wed Jun 10 2020(Updated: )
An incomplete fix for CVE-2020-12662 was shipped for Unbound in Red Hat Enterprise Linux 7, as part of erratum RHSA-2020:2414. Vulnerable versions of Unbound could still amplify an incoming query into a large number of queries directed to a target, even with a lower amplification ratio compared to versions of Unbound that shipped before the mentioned erratum. This issue is about the incomplete fix for CVE-2020-12662, and it does not affect upstream versions of Unbound.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Nlnetlabs Unbound | =1.6.6-5 | |
| Redhat Enterprise Linux | =7.0 | |
| redhat/unbound | <1.6.6-5.el7_8 | 1.6.6-5.el7_8 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1846026
- https://access.redhat.com/security/cve/CVE-2020-12662
- https://access.redhat.com/errata/RHSA-2020:2414
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1837597
- https://access.redhat.com/errata/RHSA-2020:2642
- https://access.redhat.com/security/cve/cve-2020-10772
Frequently Asked Questions
What is CVE-2020-10772?
CVE-2020-10772 is a vulnerability in Unbound, a DNS resolver, that allows for amplification of incoming queries directed at a target.
What versions of Unbound are affected by CVE-2020-10772?
Versions 1.6.6-5 of Unbound are affected by CVE-2020-10772.
What is the severity of CVE-2020-10772?
CVE-2020-10772 has a severity rating of 7.5 (high).
How can CVE-2020-10772 be exploited?
CVE-2020-10772 can be exploited by sending a specially crafted query to a vulnerable Unbound server, resulting in amplification of the query and redirecting a large number of queries to a target.
How can I fix CVE-2020-10772?
To fix CVE-2020-10772, upgrade to version 1.6.6-5.el7_8 or later of Unbound.
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