CVE-2009-2069

Severity: medium (CVSS 5.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-06-15 · updated 2026-06-16
Weakness: CWE-287

Description

Microsoft Internet Explorer before 8 displays a cached certificate for a (1) 4xx or (2) 5xx CONNECT response page returned by a proxy server, which allows man-in-the-middle attackers to spoof an arbitrary https site by letting a browser obtain a valid certificate from this site during one request, and then sending the browser a crafted 502 response page upon a subsequent request.

Affected products

Microsoft Ie: 5.0-sp1, 5.0-sp4, 5.22, 6.0-sp1, 6.0-sp2
Microsoft Internet Explorer 11: 3.0, 3.0.1, 3.0.2, 3.1, 3.2, 4.0 (+83)

References

http://research.microsoft.com/apps/pubs/default.aspx?id=79323
http://research.microsoft.com/pubs/79323/pbp-final-with-update.pdf
http://www.securityfocus.com/bid/35411
http://research.microsoft.com/apps/pubs/default.aspx?id=79323
http://research.microsoft.com/pubs/79323/pbp-final-with-update.pdf
http://www.securityfocus.com/bid/35411

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