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 Download attachment "OpenPGP_0x00D863679420BDD3.asc" of type "application/pgp-keys" (3135 bytes) Download attachment "OpenPGP_signature" of type "application/pgp-signature" (841 bytes)
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