CVE-2015-8078
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 · uneditedInteger overflow in the index_urlfetch function in imap/index.c in Cyrus IMAP 2.3.19, 2.4.18, and 2.5.6 allows remote attackers to have unspecified impact via vectors related to urlfetch range checks and the section_offset variable. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-8076.
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 confidenceInteger overflow vulnerability in the index_urlfetch function in Cyrus IMAP's imap/index.c. The overflow occurs in the section_offset variable during urlfetch range checks, allowing remote attackers unspecified impact. This is an incomplete fix for CVE-2015-8076.
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= 42.1= 13.2= 2.3.0= 2.3.1= 2.3.2= 2.3.3= 2.3.4= 2.3.5= 2.3.6= 2.3.7= 2.3.8= 2.3.9= 2.3.10= 2.3.11CVSS 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
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:L/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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Confirm Cyrus IMAP is installedRun 'rpm -qa | grep cyrus-imap' (RPM-based) or 'dpkg -l | grep cyrus' (Debian-based) to list installed Cyrus IMAP packagesAffected if No Cyrus IMAP packages are found, the system is not affected by this CVE
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Identify the installed Cyrus IMAP versionRun 'cyrus-imapd -v' or check the package version with 'rpm -q cyrus-imapd' (RPM) or 'dpkg -s cyrus-imapd' (Debian)Affected if The version number is between 2.3.0 and 2.3.11 inclusive, including exact versions 2.3.0 through 2.3.11
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Check if the IMAP service is runningRun 'systemctl status cyrus-imapd' or 'ps aux | grep cyrus' to see if the Cyrus IMAP daemon is activeAffected if The service is running and accepts IMAP connections, making the vulnerability reachable
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Verify the index module is accessibleCheck if the 'urlfetch' feature is enabled in the IMAP configuration file (typically /etc/cyrus/imapd.conf) by looking for 'urlreject' or 'httpkeepalive' directives, or test with an IMAP client connection to verify the index functionality is accessibleAffected if The index_urlfetch function is accessible to authenticated or unauthenticated users connecting to the IMAP service
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Check OpenSUSE-specific version if applicableFor OpenSUSE systems, run 'cat /etc/os-release' to confirm the version, then check the installed Cyrus package with 'rpm -q cyrus-imapd'Affected if Running OpenSUSE 13.2 or Leap 42.1 with Cyrus IMAP versions 2.3.0-2.3.11 installed
The environment is affected if Cyrus IMAP version 2.3.0 through 2.3.11 is installed, the IMAP service is running, and the index_urlfetch functionality is accessible to users.
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 dataUpdate Cyrus IMAP to a version beyond 2.3.19, 2.4.18, and 2.5.6 to obtain the complete fix for the integer overflow. If immediate patching is not possible, restrict unauthenticated access to the IMAP service.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2015-8078 — 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-2015-8078 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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