CVE-2018-1099: Input Validation
First published: Sun Feb 25 2018(Updated: )
DNS rebinding vulnerability found in etcd 3.3.1 and earlier. An attacker can control his DNS records to direct to localhost, and trick the browser into sending requests to localhost (or any other address).
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/etcd | <3.4.0 | 3.4.0 |
| etcd | <=3.3.1 | |
| Fedora | =30 |
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Reference Links
- https://github.com/coreos/etcd/issues/9353
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1552720
- https://github.com/coreos/etcd/commit/a7e5790c82039945639798ae9a3289fe787f5e56
- https://www.twistlock.com/2018/02/28/dear-developers-beware-dns-rebinding/
- https://bugzilla.redhat.com/show_bug.cgi?id=1552717
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JX7QTIT465BQGRGNCE74RATRQLKT2QE4/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UPGYHMSKDPW5GAMI7BEP3XQRVRLLBJKS/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UPGYHMSKDPW5GAMI7BEP3XQRVRLLBJKS/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JX7QTIT465BQGRGNCE74RATRQLKT2QE4/
Frequently Asked Questions
What is the severity of CVE-2018-1099?
CVE-2018-1099 has a medium severity rating due to its potential for compromising local resources through DNS rebinding.
How do I fix CVE-2018-1099?
To fix CVE-2018-1099, upgrade etcd to version 3.4.0 or later.
What systems are affected by CVE-2018-1099?
CVE-2018-1099 affects etcd versions 3.3.1 and earlier across various distributions including Red Hat and Fedora.
Can an attacker exploit CVE-2018-1099 remotely?
Yes, an attacker can exploit CVE-2018-1099 remotely by directing DNS records to localhost.
What are the consequences of CVE-2018-1099?
The consequences of CVE-2018-1099 include unauthorized access to local resources and potential data breaches.
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