Bug 1760618 (CVE-2019-15165)

Summary:	CVE-2019-15165 libpcap: Resource exhaustion during PHB header length validation
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, 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:	2020-11-04 02:22:41 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, 1792207, 1792208
Bug Blocks:	1760627

Description Pedro Sampaio 2019-10-10 23:28:09 UTC

sf-pcapng.c in libpcap before 1.9.1 does not properly validate the PHB header length before allocating memory.

Upstream patch:

https://github.com/the-tcpdump-group/libpcap/commit/87d6bef033062f969e70fa40c43dfd945d5a20ab
https://github.com/the-tcpdump-group/libpcap/commit/a5a36d9e82dde7265e38fe1f87b7f11c461c29f6

References:

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

Comment 1 Pedro Sampaio 2019-10-10 23:58:51 UTC

Created libpcap tracking bugs for this issue:

Affects: fedora-all [bug 1760624]

Comment 3 Riccardo Schirone 2020-07-23 12:59:40 UTC

Statement:

A Low Impact has been given to this flaw even though the CVSSv3 is 7.5, because libpcap library is mainly used as part of debugging tools like wireshark or tcpdump, where an impact to the Availability is not considered security relevant in a reasonable scenario.

Comment 4 errata-xmlrpc 2020-11-04 01:53:06 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4547 https://access.redhat.com/errata/RHSA-2020:4547

Comment 5 Product Security DevOps Team 2020-11-04 02:22:41 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-2019-15165