Bug 1588185 (CVE-2018-10851)

Summary: CVE-2018-10851 pdns: Memory leak while parsing malformed records
Product: [Other] Security Response Reporter: Pedro Sampaio <psampaio>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: mstevens, ruben, sander, security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: pdns-recursor 4.1.5, pdns-recursor 4.0.9, pdns 4.1.5, pdns 4.0.6 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-10-25 09:45:51 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1649031, 1649032, 1649042, 1649043    
Bug Blocks:    

Description Pedro Sampaio 2018-06-06 21:19:58 UTC 
A vulnerability was in found in PowerDNS Authoritative Server (from 3.3.0 up to and including 4.1.3) and PowerDNS Recursor (from 3.2 up to and including 4.1.3). The issue is a memory leak occurring while parsing some malformed records, due to the fact that some memory is allocated parsing a record and is not always properly released if the record is not valid.

In the authoritative server, it allows an authorized user to cause a denial of service by inserting specially crafted records in a zone under their control, then sending DNS queries for that zone.

In the recursor, it allows a malicious auth server to cause a denial of service by sending specially crafted records in response to a legitimate query by an authorized user.

References:

https://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2018-03.html
https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2018-04.html
Comment 1 Pedro Sampaio 2018-11-12 18:29:12 UTC 
Created pdns tracking bugs for this issue:

Affects: epel-all [bug 1649032]
Affects: fedora-all [bug 1649031]
Comment 2 Pedro Sampaio 2018-11-12 18:46:48 UTC 
Created pdns-recursor tracking bugs for this issue:

Affects: epel-all [bug 1649043]
Affects: fedora-all [bug 1649042]