Bug 1760623 (CVE-2019-15161)

Summary:	CVE-2019-15161 libpcap: Mishandled length values in reused variables
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	luhliari, mruprich, msehnout, msekleta, thozza
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libpcap 1.9.1	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-01-16 20:09:41 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:	1760624
Bug Blocks:	1760627

Description Pedro Sampaio 2019-10-10 23:54:47 UTC

rpcapd/daemon.c in libpcap before 1.9.1 mishandles certain length values because of reuse of a variable. This may open up an attack vector involving extra data at the end of a request.

Upstream patch:

https://github.com/the-tcpdump-group/libpcap/commit/617b12c0339db4891d117b661982126c495439ea

References:

https://github.com/the-tcpdump-group/libpcap/blob/libpcap-1.9/CHANGES

Comment 1 Pedro Sampaio 2019-10-10 23:58:19 UTC

Created libpcap tracking bugs for this issue:

Affects: fedora-all [bug 1760624]

Comment 2 Riccardo Schirone 2020-01-16 16:35:44 UTC

RPCAPD support added in tcpdump 1.9.0 (see https://github.com/the-tcpdump-group/libpcap/blob/libpcap-1.9/CHANGES#L74).
RHEL 6 and 7 ship an older version of libpcap that does not even have the vulnerable file.
RHEL 8 ships a newer version, however it is not compiled with RPCAPD support (--enable-remote is not specified).

Comment 3 Riccardo Schirone 2020-01-16 16:35:46 UTC

Statement:

This issue did not affect the versions of libpcap as shipped with Red Hat Enterprise Linux 6, 7, and 8 as they did not include support for RPCAPD.

Comment 4 Product Security DevOps Team 2020-01-16 20:09:41 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-2019-15161