Bug 743758 – CVE-2011-3605 radvd: temporary denial of service flaw in process_rs()

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Bug 743758 - (CVE-2011-3605) CVE-2011-3605 radvd: temporary denial of service flaw in process_rs()

Summary:	CVE-2011-3605 radvd: temporary denial of service flaw in process_rs()

Status:	NEW

Aliases:	CVE-2011-3605

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
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URL:
Whiteboard:	impact=low,public=20111004,reported=2...
Keywords:	Security

Depends On:	744116 744119 744120 744121 744122 744123
Blocks:	743759
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Reported:	2011-10-05 17:58 EDT by Vincent Danen
Modified:	2015-08-20 03:50 EDT (History)
CC List:	3 users (show)

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Doc Type:	Bug Fix
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Description Vincent Danen 2011-10-05 17:58:58 EDT

A temporary denial of service flaw was found in radvd's process_rs() function, where it would call mdelay() on the same thread in which it handled all input.  If ->UnicastOnly were set, an attacker could cause a flood with ND_ROUTER_SOLICIT and fill the input queue of the daemon.  This would cause a brief outage of approximately MAX_RA_DELAY_TIME / 2 * sizeof_input_queue when handling new clients, where MAX_RA_DELAY_TIME is 500ms, leading to delays of more than a minute.  Note: this is only the case in unicast-only mode; there is no denial of service in the (normal, default) anycast mode. (CVE-2011-3605)

This is corrected in upstream git [1].

[1] https://github.com/reubenhwk/radvd/commit/2591d0189257caeaae2057dfed0a260310497a61

Acknowledgements:

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

Comment 1 Huzaifa S. Sidhpurwala 2011-10-07 01:33:36 EDT

This issue affects the version of radvd as shipped with Red Hat Enterprise
Linux 4, 5 and 6.

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

Comment 2 Huzaifa S. Sidhpurwala 2011-10-07 01:33:57 EDT

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

Comment 3 Huzaifa S. Sidhpurwala 2011-10-07 01:38:17 EDT

Created radvd tracking bugs for this issue

Affects: fedora-all [bug 744116]

Comment 5 Huzaifa S. Sidhpurwala 2011-10-24 05:58:45 EDT

Statement:

The Red Hat Security Response Team has rated this issue as having low security impact, a future update may address this flaw in radvd.

Comment 6 Fedora Update System 2011-10-26 23:55:32 EDT

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 7 Fedora Update System 2011-10-26 23:57:01 EDT

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 8 Fedora Update System 2011-10-28 13:22:42 EDT

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 9 Fedora Update System 2011-10-28 13:23:33 EDT

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 10 Fedora Update System 2011-11-04 21:31:25 EDT

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.

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