CVE-2015-3455: n/a vulnerability

CVE-2015-3455: 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 configure...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 05:47 UTC (UTC+00:00)

Security readout for executives and security teams

This vulnerability affects older Squid proxy deployments using client-first SSL-bump. In that mode, Squid may accept a certificate without properly matching its domain or hostname, allowing a network man-in-the-middle to impersonate HTTPS servers through the proxy. Exposure is likely limited to organizations running affected Squid versions with client-first SSL-bump enabled. Standard Squid deployments without that configuration are not identified as affected in the source bundle. Treat this as a targeted proxy trust issue. Prioritize remediation if Squid is used for HTTPS interception, especially on enterprise egress paths where compromised trust could expose credentials or sensitive sessions. Mitigation focus: Upgrade Squid to 3.2.14, 3.3.14, 3.4.13, 3.5.4, or later.; Apply relevant distribution vendor updates from Red Hat, Fedora, openSUSE, Mageia, Mandriva, or Oracle.; Review whether client-first SSL-bump is enabled and still required..

Prepared: Jun 13, 2026, 22:39 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 18, 2015, 15:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

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Weakness

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