Bug 1649051 (CVE-2018-14663) - CVE-2018-14663 dnsdist: Record smuggling when adding ECS or XPF
Summary: CVE-2018-14663 dnsdist: Record smuggling when adding ECS or XPF
Status: NEW
Alias: CVE-2018-14663
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
(Show other bugs)
Version: unspecified
Hardware: All Linux
low
low
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Assignee: Red Hat Product Security
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Whiteboard: impact=low,public=20181108,reported=2...
Keywords: Security
Depends On: 1649052 1649053
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-11-12 19:29 UTC by Pedro Sampaio
Modified: 2018-11-12 19:29 UTC (History)
2 users (show)

Fixed In Version: dnsdist 1.3.3
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Description Pedro Sampaio 2018-11-12 19:29:21 UTC
An issue has been found in PowerDNS DNSDist allowing a remote attacker to craft a DNS query with trailing data such that the addition of a record by dnsdist, for example an OPT record when adding EDNS Client Subnet, might result in the trailing data being smuggled to the backend as a valid record while not seen by dnsdist. This is an issue when dnsdist is deployed as a DNS Firewall and used to filter some records that should not be received by the backend. This issue occurs only when either the ‘useClientSubnet’ or the experimental ‘addXPF’ parameters are used when declaring a new backend.

References:

https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2018-08.html

Comment 1 Pedro Sampaio 2018-11-12 19:29:56 UTC
Created dnsdist tracking bugs for this issue:

Affects: epel-7 [bug 1649053]
Affects: fedora-all [bug 1649052]


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