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Plan9portApplication · 9fans

CVE-2025-7208

CRITICAL · 9.8 CVSS v3.1 Published 2025-07-09
Fix available
A fix is available. Upgrade to after 2025-03-29 or later.
See remediation →
100/100
Remediation priority · Urgent
Public exploit Remotely reachable No privileges Zero-click Patch available

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
A vulnerability was found in 9fans plan9port up to 9da5b44. It has been classified as critical. This affects the function edump in the library /src/plan9port/src/libsec/port/x509.c. The manipulation leads to heap-based buffer overflow. The exploit has been disclosed to the public and may be used. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available. The identifier of the patch is b3e06559475b0130a7a2fb56ac4d131d13d2012f. It is recommended to apply a patch to fix this issue.

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 confidence

Heap-based buffer overflow in the edump function of libsec's x509.c library allows memory corruption. The vulnerability is in the X.509 certificate parsing code and can potentially be exploited for remote code execution given the critical CVSS 9.8 score.

MitigationApply the provided patch (b3e06559475b0130a7a2fb56ac4d131d13d2012f) to fix the buffer overflow in the edump function, then rebuild and redeploy the plan9port library.

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
Plan9portApplication
Affected:<= 2025-03-29

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
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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. Identify plan9port installation
    Locate the plan9port installation by checking common paths such as /usr/local/plan9, $HOME/plan9, or via 'which' for plan9 utilities. Also check if libsec.a or libsec.so exists in standard library directories.
    Affected if plan9port is installed on the system
  2. Determine plan9port version
    Check the version or build date of the installed plan9port. Look for version tags, build timestamps, or the date of the installation directory. If the source was built locally, check the git log or build artifacts for the date 2025-03-29 or earlier.
    Affected if The installed version or build date is on or before March 29, 2025
  3. Verify libsec library presence
    Confirm that the libsec library (libsec.a or libsec.so) from plan9port is in use. This library contains the vulnerable x509.c code with the edump function.
    Affected if libsec from plan9port is linked or loaded by any application on the system
  4. Assess X.509 certificate parsing usage
    Identify applications or services that use plan9port's libsec for X.509 certificate parsing. Review application dependencies and logs for certificate handling operations that would invoke the edump function.
    Affected if Any application uses plan9port's libsec to parse X.509 certificates

The environment is affected if plan9port with libsec dated 2025-03-29 or earlier is installed and actively parsing X.509 certificates.

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 2025-03-29
Vendor patch git.9front.org →
Interim mitigation

Apply the provided patch (b3e06559475b0130a7a2fb56ac4d131d13d2012f) to fix the buffer overflow in the edump function, then rebuild and redeploy the plan9port library.

Recommended fix Moderate confidence

Commit b3e06559475b0130a7a2fb56ac4d131d13d2012f or later (plan9front rolling release after 2025-03-29)

  1. Clone or update the plan9port repository: git clone https://git.9front.org/plan9front/plan9front /path/to/plan9port
  2. Navigate to the repository: cd /path/to/plan9port
  3. Fetch the latest commits: git fetch origin
  4. Checkout the fixed commit: git checkout b3e06559475b0130a7a2fb56ac4d131d13d2012f
  5. Alternatively, apply the patch directly: git cherry-pick b3e06559475b0130a7a2fb56ac4d131d13d2012f
  6. Rebuild the library: cd src/libsec/port && make
  7. Reinstall the updated libraries: sudo make install

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

Fix this in Plan9port Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing6.0 h
  • Review / QA3.0 h
18.0 hours of engineering $3,120
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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-2025-7208 in production — separate from our analysis above.

No notes yet

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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