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Bug 233253

Summary:	CVE-2007-1560 Squid TRACE DoS
Product:	Red Hat Enterprise Linux 5	Reporter:	Mark J. Cox <mjc>
Component:	squid	Assignee:	Martin Nagy <mnagy>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	5.0	CC:	hripps, mbacovsk
Target Milestone:	---	Keywords:	Reopened, Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:	public=20070320,reported=20070321,source=internet,impact=moderate
Fixed In Version:	RHSA-2007-0131	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-12-13 11:58:33 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 Mark J. Cox 2007-03-21 09:09:10 UTC

According to:
http://www.squid-cache.org/Advisories/SQUID-2007_1.txt

  "Due to an internal error Squid-2.6 is vulnerable to a denial
  of service attack when processing the TRACE request method."

See
    http://www.squid-cache.org/Versions/v2/2.6/changesets/11349.patch

This may only affect Squid 2.6 and therefore only RHEL5, will need confirmation

Comment 2 Josh Bressers 2007-03-21 15:22:27 UTC

I don't believe this is a security flaw.  I can send a request to the squid
server.  The child process does indeed die via an assertion error, but the
parent process start a new child to handle the new incoming requests.  I've
mailed upstream and vendor-sec to see if I'm mistaken.  I'll add a note if I'm
wrong.

Comment 4 Josh Bressers 2007-03-22 18:16:48 UTC

This is going to be considered a security flaw after all.  As was pointed out by
upstream, since there is only one child process, it would be possible for an
attacker to send the same request in a loop which would prevent other users from
using the proxy.

Since the server can recover, and the attacker must be behind the proxy, we are
labeling this as moderate severity.

Comment 5 Martin Bacovsky 2007-03-23 18:19:40 UTC

This issue should be fixed in squid-2.6.STABLE6-4.el5. Package was built and
tested. Waiting for advisory.

Comment 9 Red Hat Bugzilla 2007-04-03 18:53:46 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-2007-0131.html