Bug 990186 - squid: cachemgr regression introduced in RHSA-2013:0505
Summary: squid: cachemgr regression introduced in RHSA-2013:0505
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: squid
Version: 6.4
Hardware: Unspecified
OS: Unspecified
Target Milestone: rc
: ---
Assignee: Pavel Šimerda (pavlix)
QA Contact: BaseOS QE Security Team
Depends On:
Blocks: 1009402
TreeView+ depends on / blocked
Reported: 2013-07-30 14:25 UTC by Tomas Hoger
Modified: 2013-11-14 10:36 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2013-11-14 10:36:37 UTC
Target Upstream Version:

Attachments (Terms of Use)
Upstream patch (931 bytes, patch)
2013-09-11 09:56 UTC, Michal Luscon
no flags Details | Diff

Description Tomas Hoger 2013-07-30 14:25:38 UTC
Description of problem:
A fix for CVE-2012-5643 released via RHSA-2013:0505 as part of Red Hat Enterprise Linux 6.4 introduced a regression to the cachemgr.cgi.  CGI application crashes whenever an attempt is made to make an authenticated connection to a proxy server.

Version-Release number of selected component (if applicable):

Steps to Reproduce:
1. install squid and httpd
2. open http://localhost/Squid/cgi-bin/cachemgr.cgi
3. enter arbitrary value to the password field and submit
4. see Internal Server Error and httpd error_log containing a crash backtrace starting as:

*** glibc detected *** /usr/lib/squid/cachemgr.cgi: free(): invalid pointer: 0x00ca7260 ***
======= Backtrace: =========

Additional info:
The problem is in tools/cachemgr.cc make_auth_header(), which was modified by the patch to free str64 returned by base64_encode().  However, pointer returned by base64_encode() is a pointer to base64_encode()'s static result[] array, not a dynamically allocate memory (that is difference from squid 3.2 code base).


Comment 3 Eliezer Croitoru 2013-07-30 15:43:50 UTC
Squid now is already releasing beta which means that RH is far being just BUG fixes but already late in distributing the latest stable which is 3.3.8.


Comment 5 Tomas Hoger 2013-08-01 19:22:19 UTC
(In reply to Eliezer Croitoru from comment #3)
> Squid now is already releasing beta which means that RH is far being
> just BUG fixes but already late in distributing the latest stable which is
> 3.3.8.

This bug report is about the specific problem.  If you are interesting in other fixes or enhancements from newer upstream squid version, please consider filing separate request with details.

Comment 6 Michal Luscon 2013-09-11 09:56:46 UTC
Created attachment 796320 [details]
Upstream patch

Comment 10 Eliezer Croitoru 2013-09-20 01:31:04 UTC
(In reply to Michal Luscon from comment #6)
> Created attachment 796320 [details]
> Upstream patch

This patch was tested in the newer version of squid.
I do not know how it goes inside RH but, this patch means there is an update to the RPM?


Comment 11 Ondrej Vasik 2013-09-20 07:54:58 UTC
Once it gets through the internal testing, there will be an updated oficially supported rpm available.

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