dbcve.org
Debian LinuxOperating system · Debian

CVE-2022-0194

CRITICAL · 9.8 CVSS v3.1 Published 2023-03-28
Fix available
A fix is available. Upgrade to 3.1.13 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
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Netatalk. Authentication is not required to exploit this vulnerability. The specific flaw exists within the ad_addcomment function. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-15876.

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

A stack-based buffer overflow in the ad_addcomment function of Netatalk allows remote unauthenticated attackers to execute arbitrary code as root due to insufficient length validation before copying user-supplied data to a fixed-size stack-based buffer.

MitigationApply the vendor patch for CVE-2022-0194 to Netatalk; if immediate patching is not feasible, restrict network access to the AFP service and consider disabling the ad_addcomment functionality until a patch is available.

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
Debian LinuxOperating system
Affected:= 10.0= 11.0
NetatalkApplication
Affected:< 3.1.13

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 Netatalk installation and version
    Run 'afpd -v' or 'netatalk -v' to determine the installed Netatalk version
    Affected if The installed version is lower than 3.1.13
  2. Confirm the ad_addcomment function exists
    Check if the Netatalk binary includes the ad_addcomment function by examining the compiled binary or checking the running AFP service for comment-related operations
    Affected if The ad_addcomment function is present and accessible in the AFP service
  3. Verify AFP service accessibility
    Check if the AFP service (typically port 548) is listening on a network interface by running 'netstat -tlnp | grep 548' or 'ss -tlnp | grep 548'
    Affected if The AFP service is bound to a network interface and reachable from remote systems
  4. Check for comment addition capability exposure
    Attempt to determine if the comment functionality is exposed by testing AFP protocol access or reviewing service configuration for comment-related features
    Affected if The ad_addcomment functionality is enabled and accessible to unauthenticated users

A system is affected if it runs Netatalk version lower than 3.1.13 with the AFP service exposed on the network and the ad_addcomment function accessible to remote unauthenticated users.

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 3.1.13 or later
Fixed in 3.1.13
Interim mitigation

Apply the vendor patch for CVE-2022-0194 to Netatalk; if immediate patching is not feasible, restrict network access to the AFP service and consider disabling the ad_addcomment functionality until a patch is available.

Recommended fix High confidence

Netatalk 3.1.13 or later

  1. Upgrade Netatalk to version 3.1.13 or later to resolve the stack-based buffer overflow vulnerability in the ad_addcomment function
  2. For Debian 10 (Buster) and Debian 11 (Bullseye) users: Update the netatalk package via apt-get update && apt-get install netatalk or apt-get upgrade netatalk
  3. Verify the installed version matches or exceeds 3.1.13 using 'dpkg -l netatalk' or 'apt show netatalk'
  4. Restart the netatalk service after upgrading to ensure the new binary is running

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

Fix this in Debian Linux Scoped from the published advisory
  • Consultation2.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
16.0 hours of engineering $2,800
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Scan for this in your stack

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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-2022-0194 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