Bug 1760514 (CVE-2018-16228)

Summary:	CVE-2018-16228 tcpdump: Access to uninitialized buffer in print_prefix() function in print-hncp.c
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	luhliari, mlichvar, mruprich, msehnout, msekleta, thozza
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	tcpdump 4.9.3	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in tcpdump where an uninitialized buffer is accessed in tcpdump while printing HNCP packets captured in a pcap file or coming from the network. A remote attacker may abuse this flaw by sending specially crafted packets that, when printed, would trigger the flaw and crash the application. System availability is the highest threat from this vulnerability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-11-04 02:22:29 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:	1760626, 1791733
Bug Blocks:	1760628

Description Pedro Sampaio 2019-10-10 17:29:47 UTC

The HNCP parser in tcpdump before 4.9.3 has a buffer over-read in print-hncp.c:print_prefix().

Upstream patch:

https://github.com/the-tcpdump-group/tcpdump/commit/83a412a5275cac973c5841eca3511c766bed778d

References:

https://github.com/the-tcpdump-group/tcpdump/blob/tcpdump-4.9/CHANGES

Comment 1 Pedro Sampaio 2019-10-11 00:04:28 UTC

Created tcpdump tracking bugs for this issue:

Affects: fedora-all [bug 1760626]

Comment 5 Eric Christensen 2020-01-20 13:14:53 UTC

Statement:

This issue does not affect the versions of tcpdump as shipped with Red Hat Enterprise Linux 7 as they already include the patch.

Comment 6 Product Security DevOps Team 2020-11-04 02:22:29 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2018-16228

Comment 7 errata-xmlrpc 2020-11-04 03:41:19 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4760 https://access.redhat.com/errata/RHSA-2020:4760