CVE-2009-0801

Name: CVE-2009-0801
Creator: NVD / NIST
Published: 2009-03-04T16:30:00.17+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.09%

Last modified Jun 16, 2026

CVE-2009-0801 is a vulnerability of currently unknown severity. Squid, 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.. EPSS estimates a 3.09% chance of exploitation in the next 30 days.

Description

Squid, 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.

Metrics

EPSS Probability

3.09%

86.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-264

Affected Software

Vendor	Product	Versions
Squid	Squid Web Proxy Cache	2.7
Squid	Squid Web Proxy Cache	2.7.stable5
Squid	Squid Web Proxy Cache	2.7.stable6
Squid	Squid Web Proxy Cache	3.0
Squid	Squid Web Proxy Cache	3.0_pre1
Squid	Squid Web Proxy Cache	3.0_pre2
Squid	Squid Web Proxy Cache	3.0_pre3
Squid	Squid Web Proxy Cache	3.0_stable1
Squid	Squid Web Proxy Cache	3.0_stable2
Squid	Squid Web Proxy Cache	3.0_stable3
Squid	Squid Web Proxy Cache	3.0_stable4
Squid	Squid Web Proxy Cache	3.0_stable5
Squid	Squid Web Proxy Cache	3.0_stable6
Squid	Squid Web Proxy Cache	3.0_stable7
Squid	Squid Web Proxy Cache	3.0_stable12
Squid	Squid Web Proxy Cache	3.0_stable13

References

http://www.kb.cert.org/vuls/id/435052Third Party Advisory, US Government Resource
http://www.securityfocus.com/bid/33858
http://www.kb.cert.org/vuls/id/435052Third Party Advisory, US Government Resource
http://www.securityfocus.com/bid/33858

Timeline

Published: Mar 4, 2009
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2009-0801?

How severe is CVE-2009-0801?

Severity scoring for CVE-2009-0801 is pending analysis. The EPSS model estimates a 3.09% probability of exploitation in the next 30 days.

How do I fix CVE-2009-0801?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2009-0801?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST