dbcve.org
Opera BrowserApplication · Opera

CVE-2008-4292

HIGH · 10.0 CVSS v2.0 Published 2008-09-27
Fix available
A fix is available. Upgrade to after 9.51 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

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 · unedited
Opera before 9.52 does not check the CRL override upon encountering a certificate that lacks a CRL, which has unknown impact and attack vectors. NOTE: it is not clear whether this is a vulnerability, but the vendor included it in a security section of the advisory.

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 · low confidence

Opera before 9.52 did not properly check the CRL (Certificate Revocation List) override setting when encountering a certificate that lacks an associated CRL, potentially leading to improper certificate validation behavior. The specific security impact is described as having unknown impact and attack vectors.

MitigationUpgrade Opera to version 9.52 or later; for legacy systems, consider using alternative browsers or implementing additional certificate validation controls at the network level.

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
Opera BrowserApplication
Affected:<= 9.51= 5.0= 5.02= 5.10= 5.11= 5.12= 6.0= 6.1= 6.01= 6.02= 6.03= 6.04

CVSS 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
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete

AV:N/AC:L/Au:N/C:C/I:C/A:C

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 checks

Work through these to decide whether this CVE applies to you.

  1. Determine Opera browser version
    Open Opera, go to Help > About Opera, or right-click opera.exe and select Properties > Details to view the File Version
    Affected if The displayed version is earlier than 9.52 (for example, 9.51, 10.x, or any version listed in the affected ranges)
  2. Locate Opera preferences file
    Find the operaprefs.ini file in the Opera user profile directory, typically in %APPDATA%\Opera\Opera\ or within the Opera installation folder for portable versions
    Affected if The file exists and contains certificate-related settings
  3. Check CRL override setting in preferences
    Open operaprefs.ini in a text editor and search for entries related to certificate validation or CRL handling (keywords: CRL, Override, Certificate, Validation, CheckServerCertificate)
    Affected if A setting like 'CheckServerCertificate=0' or a CRL override option is enabled (set to 1 or true)
  4. Verify certificate validation behavior
    Attempt to access a website with a valid SSL certificate that lacks an attached CRL distribution point while CRL checking is theoretically enabled in Opera settings
    Affected if The browser allows the connection without properly validating the certificate's revocation status against the CRL override setting

A user is affected if Opera version is 9.51 or earlier (or any version before 9.52) AND the CRL override or certificate validation setting in Opera preferences is configured to bypass proper revocation checking.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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.

dbcve · scoped
Upgrade available Upgrade to a release after 9.51
Interim mitigation

Upgrade Opera to version 9.52 or later; for legacy systems, consider using alternative browsers or implementing additional certificate validation controls at the network level.

Recommended fix High confidence

Opera 9.52 or later (note: Opera 9.x is legacy; consider migrating to modern Chromium-based Opera for ongoing security support)

  1. 1. Download Opera 9.52 or later from the official Opera archives or a trusted software repository
  2. 2. Backup any important data such as bookmarks, settings, and saved passwords from the current Opera installation
  3. 3. Uninstall the affected Opera version (5.0, 5.02, 5.10, or 9.51 and below)
  4. 4. Install Opera 9.52 or later
  5. 5. Restore bookmarks and settings from the backup
  6. 6. Verify the installation by checking Opera's 'About' section to confirm the version number
  7. 7. Test SSL certificate validation by visiting HTTPS websites to ensure CRL checking is functioning properly
Caveat Very old Opera 5.x versions may have compatibility issues with modern websites and lack ongoing security updates; legacy Opera 9.x also lacks modern security features and is no longer supported

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Opera Browser Scoped from the published advisory
  • Consultation1.0 h
  • Implementation1.0 h
  • Testing1.0 h
  • Review / QA1.0 h
4.0 hours of engineering $750
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,200.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2008-4292 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2008-4292 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data