Squid SSL-Bump Certificate Validation Bypass Vulnerability

Published: 2015-09-08 09:04:34
CVE Author: NIST National Vulnerability Database (NVD)

CVSS Base Vector:
AV:N/AC:H/Au:N/C:N/I:P/A:N

Detection Type:
Remote Banner Unreliable

Summary:
This host is running Squid and is prone to certificate validation bypass vulnerability.

Detection Method:
Checks if a vulnerable version is present on the target host.

Technical Details:
The client-first SSL-bump feature does not properly validate X.509 server certificate domain and hostname fields. A remote server can create a specially crafted certificate to bypass client certificate validation.

Impact:
Successful exploitation will allow remote attackers to bypass client certificate validation.

Affected Versions:
Squid 3.2 -> 3.2.13 Squid 3.3 -> 3.3.13 Squid 3.4 -> 3.4.12 Squid 3.5 -> 3.5.3

Recommendations:
Apply the patch or upgrade to version Squid 3.5.4, 3.4.13, 3.3.14, 3.2.14 or later.

Solution Type:
Vendor Patch

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2015-3455

SecurityFocus Bugtraq ID:

https://www.securityfocus.com/bid/74438

References:

http://www.securitytracker.com/id/1032221
http://advisories.mageia.org/MGASA-2015-0191.html
http://www.squid-cache.org/Advisories/SQUID-2015_1.txt

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Severity
Low
CVSS Score
2.6

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