Bug 1550223 (CVE-2018-7183)

Summary: CVE-2018-7183 ntp: decodearr() can write beyond its buffer limit
Product: [Other] Security Response Reporter: Pedro Sampaio <psampaio>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: linville, mlichvar
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: ntp 4.2.8p11 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-10-21 19:57:21 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1550228, 1550229    
Bug Blocks: 1550226    

Description Pedro Sampaio 2018-02-28 19:48:09 UTC
ntpq is a monitoring and control program for ntpd. decodearr() is an internal function of ntpq that is used to -- wait for it -- decode an array in a response string when formatted data is being displayed. This is a problem in affected versions of ntpq if a maliciously-altered ntpd returns an array result that will trip this bug, or if a bad actor is able to read an ntpq request on its way to a remote ntpd server and forge and send a response before the remote ntpd sends its response. It's potentially possible that the malicious data could become injectable/executable code.

References:

http://support.ntp.org/bin/view/Main/NtpBug3414

Comment 1 Pedro Sampaio 2018-02-28 19:51:33 UTC
Created ntp tracking bugs for this issue:

Affects: fedora-all [bug 1550228]