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Vulnerability record · CVE-2015-3455 · published 18 May 2015

CVE-2015-3455: Oracle linux improper input validation vulnerability

Oracle · Linux

Squid 3.2.x before 3.2.14, 3.3.x before 3.3.14, 3.4.x before 3.4.13, and 3.5.x before 3.5.4, when configured with client-first SSL-bump, do not properly validate the domain or hostname fields of X.509 certificates, which allows man-in-the-middle attackers to spoof SSL servers via a valid certificate.

2.6 CVSS 2.0 Low EPSS 11% · top 4.1% CWE-20 · Improper input validation
2.6CVSS 2.0 base score
11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
22References
17 Jun 2026Last modified by NVD

Description

Squid 3.2.x before 3.2.14, 3.3.x before 3.3.14, 3.4.x before 3.4.13, and 3.5.x before 3.5.4, when configured with client-first SSL-bump, do not properly validate the domain or hostname fields of X.509 certificates, which allows man-in-the-middle attackers to spoof SSL servers via a valid certificate.

AV:N/AC:H/Au:N/C:N/I:P/A:N

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://advisories.mageia.org/MGASA-2015-0191.html Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183598.html Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2015-09/msg00016.html
http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html
http://rhn.redhat.com/errata/RHSA-2015-2378.html
http://www.mandriva.com/security/advisories?name=MDVSA-2015:230 Broken Link
http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html Third Party Advisory
http://www.securityfocus.com/bid/74438
http://www.securitytracker.com/id/1032221 Third Party AdvisoryVDB Entry
http://www.squid-cache.org/Advisories/SQUID-2015_1.txt Vendor Advisory
http://advisories.mageia.org/MGASA-2015-0191.html Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183598.html Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2015-09/msg00016.html
http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html
http://rhn.redhat.com/errata/RHSA-2015-2378.html
http://www.mandriva.com/security/advisories?name=MDVSA-2015:230 Broken Link
http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html Third Party Advisory
http://www.securityfocus.com/bid/74438
http://www.securitytracker.com/id/1032221 Third Party AdvisoryVDB Entry
http://www.squid-cache.org/Advisories/SQUID-2015_1.txt Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2015-3455), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.