Bug 1703417 (CVE-2019-11555)

Summary:	CVE-2019-11555 wpa_supplicant: NULL pointer dereference due to improper fragmentation reassembly state validation in EAP-pwd implementation
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bgalvani, blueowl, dcaratti, dcbw, john.j5live, linville, lkundrak, negativo17, sukulkar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	wpa_supplicant 2.8	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:54:48 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:	1703418, 1712958, 1712959
Bug Blocks:	1703420

Description Marian Rehak 2019-04-26 11:13:30 UTC

EAP-pwd implementation in hostapd (EAP server) and wpa_supplicant (EAP peer) was discovered not to validate fragmentation reassembly state properly for a case where an unexpected fragment could be received. This could result in process termination due to NULL pointer dereference.

Comment 1 Marian Rehak 2019-04-26 11:13:41 UTC

Created wpa_supplicant tracking bugs for this issue:

Affects: fedora-all [bug 1703418]

Comment 2 Marian Rehak 2019-04-26 11:26:24 UTC

References:
https://w1.fi/security/2019-5/eap-pwd-message-reassembly-issue-with-unexpected-fragment.txt

Comment 3 Riccardo Schirone 2019-05-22 14:49:32 UTC

Upstream patches:
https://w1.fi/cgit/hostap/commit/?id=d2d1a324ce937628e4d9d9999fe113819b7d4478
https://w1.fi/cgit/hostap/commit/?id=fe76f487e28bdc61940f304f153a954cf36935ea

Comment 4 Riccardo Schirone 2019-05-22 14:55:52 UTC

External References:

https://w1.fi/security/2019-5/eap-pwd-message-reassembly-issue-with-unexpected-fragment.txt

Comment 5 Riccardo Schirone 2019-05-22 15:16:04 UTC

Created hostapd tracking bugs for this issue:

Affects: epel-all [bug 1712959]
Affects: fedora-all [bug 1712958]

Comment 6 Riccardo Schirone 2019-05-22 15:24:24 UTC

Statement:

This issue did not affect the versions of wpa_supplicant as shipped with Red Hat Enterprise Linux 5, and 6 as they did not include support for EAP-pwd.

This issue did not affect the versions of wpa_supplicant as shipped with Red Hat Enterprise Linux 7, and 8 as they are not compiled with EAP-pwd enabled. In particular, the CONFIG_EAP_PWD=y option is not set at compile time.