Bug 1636598 (CVE-2018-17974)

Summary:	CVE-2018-17974 tcpreplay: heap-based buffer over-read in dlt_en10mb_encode in plugins/dlt_en10mb/en10mb.c
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	bojan
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:39:23 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:	1636599, 1636600
Bug Blocks:

Description Laura Pardo 2018-10-05 19:50:37 UTC

An issue was discovered in Tcpreplay 4.3.0 beta1. A heap-based buffer over-read was triggered in the function dlt_en10mb_encode() of the file plugins/dlt_en10mb/en10mb.c, due to inappropriate values in the function memmove(). The length (pktlen + ctx -> l2len) can be larger than source value (packet + ctx->l2len) because the function fails to ensure the length of a packet is valid. This leads to Denial of Service.


References:
https://github.com/SegfaultMasters/covering360/tree/master/tcpreplay
https://github.com/appneta/tcpreplay/issues/486

Comment 1 Laura Pardo 2018-10-05 19:51:07 UTC

Created tcpreplay tracking bugs for this issue:

Affects: epel-all [bug 1636599]
Affects: fedora-all [bug 1636600]

Comment 2 Product Security DevOps Team 2019-06-10 10:39:23 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.