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RtosApplication · Qnx

CVE-2006-0621

HIGH · 7.2 CVSS v2.0 Published 2006-02-09
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
77/100
Remediation priority · High
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
Multiple buffer overflows in QNX Neutrino RTOS 6.2.0 allow local users to execute arbitrary code via a long first argument to the (1) su or (2) passwd commands.

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 confidence

Buffer overflow vulnerability in QNX Neutrino RTOS 6.2.0 allows local users to execute arbitrary code via long first arguments to the su or passwd commands. The overflow occurs due to insufficient bounds checking when processing the command-line argument, enabling privilege escalation.

MitigationApply available patches from QNX; if no patch exists for this end-of-life version, replace the vulnerable su and passwd binaries with hardened versions or implement compensating controls such as restricting local access.

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
RtosApplication
Affected:= 6.2.0

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
Local
Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete

AV:L/AC:L/Au:N/C:C/I:C/A:C

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 QNX Neutrino RTOS version
    Run 'uname -a' or 'cat /proc/version' to display the operating system version. Look for version 6.2.0.
    Affected if The system is running QNX Neutrino RTOS version 6.2.0 exactly.
  2. Verify su binary exists
    Check if the /usr/bin/su or /bin/su file exists using 'ls -la /bin/su /usr/bin/su' or 'which su'.
    Affected if The su binary is present on the system.
  3. Verify passwd binary exists
    Check if the /usr/bin/passwd or /bin/passwd file exists using 'ls -la /bin/passwd /usr/bin/passwd' or 'which passwd'.
    Affected if The passwd binary is present on the system.
  4. Confirm local user access
    Verify you have local shell access to the system and can execute commands as a local user.
    Affected if A local user account exists that can execute su or passwd with arbitrary arguments.

The environment is affected if it is running QNX Neutrino RTOS version 6.2.0 with the su or passwd binaries accessible to local 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.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply available patches from QNX; if no patch exists for this end-of-life version, replace the vulnerable su and passwd binaries with hardened versions or implement compensating controls such as restricting local access.

Fix this in Rtos Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
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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-2006-0621 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