CVE-2009-1211: n/a vulnerability

CVE-2009-1211: Blue Coat ProxySG, when transparent interception mode is enabled, uses the HTTP Host header to determine th...

Blue Coat ProxySG, when transparent interception mode is enabled, uses the HTTP Host header to determine the remote endpoint, which allows remote attackers to bypass access controls for Flash, Java, Silverlight, and probably other technologies, and possibly communicate with restricted intranet sites, via a crafted web page that causes a client to send HTTP requests with a modified Host header.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 17, 2024, 04:09 UTC (UTC+00:00)

Security readout for executives and security teams

ProxySG could be tricked in transparent interception mode into trusting a browser-supplied Host header for destination decisions. A malicious web page could make a user's client reach places policy intended to block, including potentially restricted intranet sites. Exposure appears limited to Blue Coat ProxySG deployments using transparent interception mode. Organizations without ProxySG, or using non-transparent deployment modes, are not indicated as affected by the provided sources. Prioritize validation if legacy ProxySG transparent proxying is still in use. The business risk is policy bypass toward restricted resources, but urgency is tempered by missing CVSS, unclear affected versions, and no cited active exploitation. Mitigation focus: Identify any ProxySG appliances using transparent interception mode.; Review the Blue Coat advisory and current vendor guidance for supported remediation.; Do not rely solely on Host headers for access-control decisions..

Prepared: Jun 28, 2026, 11:04 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: Apr 1, 2009, 10:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://hypersonic.bluecoat.com/support/securityadvisories/ProxySG_in_transparent_deploymentsCVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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