Bug 743748 (CVE-2011-3601)

Summary:	CVE-2011-3601 radvd: privilege escalation flaw in process_ra()
Product:	[Other] Security Response	Reporter:	Vincent Danen <vdanen>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	aglotov, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-06-10 21:40:57 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:	744116
Bug Blocks:	743759

Description Vincent Danen 2011-10-05 21:36:56 UTC

A privilege escalation flaw was found in radvd, due to a buffer overflow in the process_ra() function.  ND_OPT_DNSSL_INFORMATION option parsing "label_len" was not checked for negative values, leading to a "suffix" buffer overflow which can lead to privilege escalation, at least if radvd is compiled without GCC's stack protection. If radvd is invoked without privilege separation (the -u option), this can lead to an escalation to root privileges.  Note: Red Hat Enterprise Linux starts radvd by default with the unprivileged user. (CVE-2011-3601)

This is corrected in upstream git [1].

[1] https://github.com/reubenhwk/radvd/commit/9dfaaaf740ce784541e76e68de4ae04dce2c0921

Note: radvd is compiled with GCC stack protection on Red Hat Enterprise Linux 5 and later.

Acknowledgements:

Red Hat would like to thank Vasiliy Kulikov of Openwall for reporting this issue.

Comment 3 Huzaifa S. Sidhpurwala 2011-10-06 08:31:06 UTC

The version of radvd shipped with Red Hat Enterprise Linux 4, 5 and 6 does not have support for IPv6 Router Advertisement Options for DNS Configuration. 

Statement:

Not Vulnerable. This issue does not affect the version of radvd package as shipped with Red Hat Enterprise Linux 4, 5 and 6.

Comment 4 Huzaifa S. Sidhpurwala 2011-10-06 08:31:42 UTC

This issue affects the version of radvd as shipped with Fedora 14 and 15.

Comment 5 Huzaifa S. Sidhpurwala 2011-10-07 05:28:51 UTC

Public via:
http://thread.gmane.org/gmane.comp.security.oss.general/5973

Comment 6 Huzaifa S. Sidhpurwala 2011-10-07 05:36:43 UTC

Created radvd tracking bugs for this issue

Affects: fedora-all [bug 744116]

Comment 7 Fedora Update System 2011-10-27 03:55:07 UTC

radvd-1.8.2-2.fc15 has been pushed to the Fedora 15 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 8 Fedora Update System 2011-10-27 03:56:37 UTC

radvd-1.8.2-2.fc14 has been pushed to the Fedora 14 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 9 Fedora Update System 2011-10-28 17:22:19 UTC

radvd-1.8.2-2.fc15 has been pushed to the Fedora 15 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 10 Fedora Update System 2011-10-28 17:23:08 UTC

radvd-1.8.2-2.fc14 has been pushed to the Fedora 14 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 11 Fedora Update System 2011-11-05 01:31:02 UTC

radvd-1.8.2-2.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.