CVE-2009-2063
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedOpera, possibly before 9.25, processes a 3xx HTTP CONNECT response before a successful SSL handshake, which allows man-in-the-middle attackers to execute arbitrary web script, in an https site's context, by modifying this CONNECT response to specify a 302 redirect to an arbitrary https web site.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceOpera browser processes 3xx HTTP CONNECT proxy responses before completing the SSL handshake, allowing a man-in-the-middle attacker to modify the CONNECT response and redirect the connection to an attacker-controlled HTTPS site. This enables execution of arbitrary JavaScript in the context of the original intended HTTPS website.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 9.24= 1.00= 2.00= 2.10= 2.12= 3.00= 3.10= 3.21= 3.50= 3.51= 3.60= 3.61CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- M
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:M/Au:N/C:P/I:P/A:P
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Check if Opera browser is installedLook for Opera executable in typical installation locations: Windows: C:\Program Files\Opera\opera.exe, Linux: /usr/bin/opera or /usr/local/bin/opera, Mac: /Applications/Opera.app. On Windows, also check the registry key HKEY_LOCAL_MACHINE\SOFTWARE\Opera Software or HKEY_CURRENT_USER\SOFTWARE\Opera SoftwareAffected if Opera browser is not found on the system
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Identify the installed Opera versionRun the Opera executable with the --version flag or check the About dialog. On Windows, the version may be stored in the registry under the Opera Software key. On Linux, check the package manager: dpkg -l opera or rpm -q operaAffected if The installed version cannot be determined or is not visible
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Compare version against affected rangeCheck if the installed version matches: 1.00, 2.00, 2.10, 2.12, 3.00, 3.10, 3.21, 3.50, 3.51, 3.60, 3.61, or any version 9.24 or lowerAffected if The installed version is one of the affected versions listed (9.24 or lower, or any of the specific 1.x/2.x/3.x versions)
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Verify proxy configuration is in useCheck Opera's proxy settings: Go to Settings > Preferences > Network > Proxy servers, or examine the operaprefs.ini file in the Opera profile directory for Proxy configurationAffected if A proxy server is configured and the browser uses CONNECT method for HTTPS connections (this is a prerequisite for the vulnerability to be exploitable)
A user is affected if Opera browser is installed with a version of 9.24 or lower (or versions 1.00 through 3.61) AND a proxy server is configured that uses the CONNECT method for HTTPS connections.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpgrade Opera browser to version 9.25 or later, which contains the fix for this vulnerability. No additional configuration or workaround is available for earlier versions.
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2009-2063 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2009-2063 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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