Bug 1552717 (CVE-2018-1099) - CVE-2018-1099 etcd: DNS rebinding vulnerability in etcd server
Summary: CVE-2018-1099 etcd: DNS rebinding vulnerability in etcd server
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-1099
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: 1552720 1552721 1553764 1566227 1566228 1590239
Blocks: 1552719
TreeView+ depends on / blocked
 
Reported: 2018-03-07 15:38 UTC by Pedro Sampaio
Modified: 2021-10-21 19:56 UTC (History)
15 users (show)

Fixed In Version: etcd 3.4.0
Clone Of:
Environment:
Last Closed: 2021-10-21 19:56:27 UTC
Embargoed:

Attachments (Terms of Use)

Description Pedro Sampaio 2018-03-07 15:38:43 UTC 
etcd 3.3.1 and earlier does not correctly restrict access to resources based on
the hostname, thus allowing a DNS rebinding attack. An attacker can control his
DNS records and trick the browser into sending requests to an etcd server on an
internal network and bypassing the same-origin policy.

Upstream issue:
https://github.com/coreos/etcd/issues/9353
Comment 1 Pedro Sampaio 2018-03-07 15:42:41 UTC 
Created etcd tracking bugs for this issue:

Affects: fedora-all [bug 1552720]
Comment 5 Riccardo Schirone 2018-06-11 09:04:21 UTC 
Patch:
https://github.com/coreos/etcd/commit/a7e5790c82039945639798ae9a3289fe787f5e56
Comment 6 Riccardo Schirone 2018-06-12 09:06:40 UTC 
Reference:
https://www.twistlock.com/2018/02/28/dear-developers-beware-dns-rebinding/
Comment 7 Riccardo Schirone 2018-06-12 09:39:46 UTC 
Mitigation:

Configure and enable authentication on the etcd server or secure your client connection via HTTPS.
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