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Message-ID: <c5c0fa6c-f24e-b23f-01c2-5efd648d4f02@treenet.co.nz>
Date: Fri, 23 Sep 2022 17:00:16 +1200
From: Amos Jeffries <squid3@...enet.co.nz>
To: oss-security@...ts.openwall.com
Subject: Fwd: [ADVISORY] SQUID-2022:1 Exposure of Sensitive Information in
Cache Manager
_________________________________________________________________
Squid Proxy Cache Security Update Advisory SQUID-2022:1
__________________________________________________________________
Advisory ID: | SQUID-2022:1
Date: | September 23, 2022
Summary: | Exposure of Sensitive Information
| in Cache Manager
Affected versions: | Squid 4.15 -> 4.17
| Squid 5.0.6 -> 5.6
Fixed in version: | Squid 5.7
__________________________________________________________________
<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-41317>
__________________________________________________________________
Problem Description:
Due to inconsistent handling of internal URIs Squid is
vulnerable to Exposure of Sensitive Information about clients
using the proxy.
__________________________________________________________________
Severity:
This problem allows a trusted client to directly access cache
manager information bypassing the manager ACL protection.
The available cache manager information contains records of
internal network structure, client credentials, client identity
and client traffic behaviour.
CVSS Score of 6.4
<https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:F/RL:X/RC:C/CR:M/IR:X/AR:X/MAV:X/MAC:L/MPR:L/MUI:X/MS:X/MC:H/MI:X/MA:X&version=3.1>
__________________________________________________________________
Updated Packages:
This bug is fixed by Squid version 5.7.
In addition, patches addressing this problem for the stable
releases can be found in our patch archives:
Squid 4:
<http://www.squid-cache.org/Versions/v4/changesets/SQUID-2022_1.patch>
Squid 5:
<http://www.squid-cache.org/Versions/v5/changesets/SQUID-2022_1.patch>
If you are using a prepackaged version of Squid then please refer
to the package vendor for availability information on updated
packages.
__________________________________________________________________
Determining if your version is vulnerable:
Squid older than 4.9 are not vulnerable.
All Squid-4.9 up to and including 4.14 have not been tested, but
should be assumed to be vulnerable.
All Squid-4.15 up to and including 4.17 are vulnerable.
All Squid-5.0.6 up to and including 5.6 are vulnerable.
__________________________________________________________________
Workaround:
Add the following to squid.conf:
acl manager url_regex +i ^[^:]+://[^/]+/squid-internal-mgr/
__________________________________________________________________
Contact details for the Squid project:
For installation / upgrade support on binary packaged versions
of Squid: Your first point of contact should be your binary
package vendor.
If you install and build Squid from the original Squid sources
then the <squid-users@...ts.squid-cache.org> mailing list is your
primary support point. For subscription details see
<http://www.squid-cache.org/Support/mailing-lists.html>.
For reporting of non-security bugs in the latest STABLE release
the squid bugzilla database should be used
<http://bugs.squid-cache.org/>.
For reporting of security sensitive bugs send an email to the
<squid-bugs@...ts.squid-cache.org> mailing list. It's a closed
list (though anyone can post) and security related bug reports
are treated in confidence until the impact has been established.
__________________________________________________________________
Credits:
This vulnerability was discovered by Mikhail Evdokimov
(aka konata).
Initial fix by Amos Jeffries of Treehouse Networks Ltd.
__________________________________________________________________
Revision history:
2022-04-17 18:30:52 UTC Initial Report
2022-08-08 11:01:47 UTC Initial Fix released
2022-09-23 05:00:00 UTC Advisory Released
__________________________________________________________________
END
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