Bug 1760447 (CVE-2018-14469)

Summary:	CVE-2018-14469 tcpdump: Buffer over-read in ikev1_n_print() function in print-isakmp.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:	An out-of-bounds read vulnerability was discovered in tcpdump while printing ISAKMP 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.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-11-04 02:21:51 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, 1791701, 1791702
Bug Blocks:	1760628

Description Pedro Sampaio 2019-10-10 14:54:16 UTC

The IKEv1 parser in tcpdump before 4.9.3 has a buffer over-read in print-isakmp.c:ikev1_n_print().

Upstream patch:

https://github.com/the-tcpdump-group/tcpdump/commit/396e94ff55a80d554b1fe46bf107db1e91008d6c

References:

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

Comment 1 Pedro Sampaio 2019-10-11 00:03:15 UTC

Created tcpdump tracking bugs for this issue:

Affects: fedora-all [bug 1760626]

Comment 2 Riccardo Schirone 2020-01-15 14:19:21 UTC

While printing a REPLAY-STATUS notify message used in IKEv1, function ikev1_n_print() in print-isakmp.c can read beyond the limits of the captured buffer, if there are not enough bytes in the buffer to read the 32bits value that indicates whether the replay detection is enabled or not. This may print memory data on the victim's screen or crash the tcpdump application.

Comment 5 Product Security DevOps Team 2020-11-04 02:21:51 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-2018-14469

Comment 6 errata-xmlrpc 2020-11-04 03:40:29 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