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Bug 241863

Summary:	CVE-2007-2525 PPPoE socket PPPIOCGCHAN denial of service
Product:	Red Hat Enterprise Linux 5	Reporter:	Marcel Holtmann <holtmann>
Component:	kernel	Assignee:	Don Howard <dhoward>
Status:	CLOSED ERRATA	QA Contact:	Martin Jenner <mjenner>
Severity:	high	Docs Contact:
Priority:	medium
Version:	5.0	CC:	dhoward, dzickus, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:	impact=important,source=secunia,reported=20070509,public=20070508
Fixed In Version:	RHSA-2007-0376	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-06-14 14:55:14 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:

Description Marcel Holtmann 2007-05-31 08:20:11 UTC

A vulnerability has been reported in the Linux Kernel, which potentially can be
exploited by malicious, local users to cause a DoS (Denial of Service).

The vulnerability is caused due to a memory leak when releasing PPPoE sockets
after they are connected, but before the "PPPIOCGCHAN" ioctl is called. This can
be exploited to cause a DoS due to memory exhaustion.

Comment 1 Don Howard 2007-06-01 23:33:11 UTC

A patch addressing this issue has been included in build 2.6.18-8.1.6.el5

Comment 3 Mike Gahagan 2007-06-08 19:16:57 UTC

Confirmed the patch is in 2.6.18-8.1.6.el5

Comment 5 Red Hat Bugzilla 2007-06-14 14:55:14 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2007-0376.html