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: NEW
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: 1590239 1552720 1552721 1553764 1566227 1566228
Blocks: 1552719
TreeView+ depends on / blocked
 
Reported: 2018-03-07 15:38 UTC by Pedro Sampaio
Modified: 2019-09-29 14:34 UTC (History)
16 users (show)

Fixed In Version:
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Doc Text:
It has been discovered that etcd does not correctly restrict access to resources based on hostname. A remote attacker could perform a DNS-rebinding attack and trick the browser into sending requests to an etcd server on an internal network, bypassing the Same-Origin Policy.
Clone Of:
Environment:
Last Closed:


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 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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