CVE-2012-1244
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 · uneditedThe NTT DOCOMO sp mode mail application 5400 and earlier for Android does not properly verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.
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 confidenceThe NTT DOCOMO sp mode mail application for Android versions 5400 and earlier fails to properly validate X.509 certificates from SSL servers, allowing man-in-the-middle attackers to intercept encrypted communications by presenting a crafted certificate. This enables attackers to impersonate legitimate mail servers and steal sensitive credentials or communications.
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<= 5400= 2546= 2631= 3000= 3100= 3200= 3300= 3400= 4000= 4200= 4300= 4400CVSS 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
- None
AV:N/AC:M/Au:N/C:P/I:P/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.
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Identify sp mode mail application versionOpen Android Settings > Apps > sp mode mail (or spモードメール), then view the Version information under App info. Alternatively, use ADB command: `adb shell dumpsys package com.nttdocomo.android.mail` and look for versionName or versionCode.Affected if The displayed version number is 5400 or lower, or exactly matches 2546, 2631, 3000, 3100, 3200, 3300, 3400, 4000, 4200, 4300, or 4400.
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Confirm mail account configuration uses SSL/TLSOpen sp mode mail app > Settings > Account settings > Incoming/Outgoing server settings. Verify that SSL or TLS is enabled for POP3/IMAP and SMTP connections.Affected if SSL or TLS encryption is configured, as the vulnerability affects SSL/TLS certificate validation.
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Check if application receives email successfullyAttempt to send or receive email through the sp mode mail application using a known working mail server.Affected if Mail flows normally, indicating the app trusts certificates without proper validation - this confirms the vulnerable code path is active.
If the installed sp mode mail version is 5400 or lower (or matches any of the specific affected versions listed), and the app uses SSL/TLS for mail connections, the environment is vulnerable to MITM attacks via improper certificate validation.
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 application to a version beyond 5400 that implements proper certificate chain validation, or implement certificate pinning for known mail server domains to prevent MITM attacks.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2012-1244 — 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-2012-1244 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
- No weaponised exploit code, or anything meant to cause harm
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