Ironport Web Security ApplianceApplication · Cisco
CVE-2012-1326
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 · uneditedCisco IronPort Web Security Appliance up to and including 7.5 does not validate the basic constraints of the certificate authority which could lead to MITM attacks
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 · moderate confidenceThe Cisco IronPort Web Security Appliance versions up to and including 7.5 fail to validate the basic constraints (specifically the CA flag) of certificate authorities during SSL/TLS certificate chain validation. This allows an attacker with access to a subordinate CA certificate to issue fraudulent certificates and intercept encrypted traffic through MITM attacks.
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
Ironport Web Security ApplianceApplication
<= 7.5CVSS 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
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.
-
Identify the appliance modelLog into the IronPort Web Security Appliance CLI or web interface and check the device model/name in the system status or dashboardAffected if The device is not a Cisco IronPort Web Security Appliance (not affected)
-
Check the installed firmware versionRun the command 'version' in the CLI or check System Administration > Software Update in the web interface to display the current software versionAffected if The version is 7.5 or lower (potentially affected)
-
Verify SSL inspection is enabledCheck the web interface under Security Services > HTTPS Proxy or run 'httpsinspect' CLI command to see if HTTPS/SSL inspection is turned onAffected if SSL inspection is enabled and version is 7.5 or lower (vulnerable to MITM attacks through subordinate CA abuse)
-
Check the SSL inspection policy configurationReview the SSL inspection policy under Web Security Manager > SSL Inspection Policy to confirm the appliance is performing certificate chain validationAffected if The appliance is performing full SSL interception with chain validation (vulnerable)
-
Examine the trusted CA certificate storeAccess Security Services > SSL Inspection > External CA Certificates to view which CA certificates are trusted for MITM inspectionAffected if A subordinate CA certificate exists in the trusted store and SSL inspection is active (attacker with access to that subordinate CA could exploit this)
-
Review SSL inspection logs for anomaliesCheck Logs > SSL Inspection Logs for any certificate validation failures or unusual certificate chain issuesAffected if Logs show certificate chain validation errors related to basic constraints or CA flag issues
You are affected if you are running Cisco IronPort Web Security Appliance version 7.5 or lower with SSL/HTTPS inspection enabled, as the appliance does not properly validate the CA flag in certificate authority basic constraints.
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 the Cisco IronPort Web Security Appliance to a version beyond 7.5 that implements proper certificate authority basic constraint validation, and verify SSL inspection functionality after the upgrade.
Fix this in Ironport Web Security Appliance
Scoped from the published advisory
- Consultation4.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,392.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2012-1326 — 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-2012-1326 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
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.
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.
- 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