dbcve.org
Router Advertisement DaemonApplication · Litech

CVE-2011-3601

HIGH · 7.5 CVSS v2.0 Published 2014-02-17
Fix available
A fix is available. Upgrade to after 1.8.1 or later.
See remediation →
84/100
Remediation priority · High
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
Buffer overflow in the process_ra function in the router advertisement daemon (radvd) before 1.8.2 allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a negative value in a label_len value.

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

Buffer overflow vulnerability in radvd (router advertisement daemon) versions before 1.8.2 in the process_ra function. The flaw allows remote attackers to send malicious router advertisements containing a negative label_len value, triggering a buffer overflow that can lead to arbitrary code execution or denial of service.

MitigationUpgrade radvd to version 1.8.2 or later to patch the buffer overflow. If immediate upgrade is not possible, consider restricting network access to trusted IPv6 neighbors or disabling radvd if not required.

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
Router Advertisement DaemonApplication
Affected:<= 1.8.1

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
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 checks

Work through these to decide whether this CVE applies to you.

  1. Check if radvd is installed
    Run 'which radvd' or check package manager (rpm -q radvd, dpkg -l radvd)
    Affected if radvd binary or package is found on the system
  2. Determine installed radvd version
    Run 'radvd -v' or 'radvd --version' to display version information
    Affected if Installed version is 1.8.1 or earlier (versions before 1.8.2)
  3. Verify if radvd service is running
    Check running processes with 'ps aux | grep radvd' or check service status with 'systemctl status radvd'
    Affected if radvd process is actively running and processing router advertisements
  4. Confirm router advertisement processing is enabled
    Inspect /etc/radvd.conf or the active radvd configuration file to verify interface definitions exist
    Affected if Configuration file exists with interface definitions that enable RA processing on any interface

The environment is affected if radvd version 1.8.1 or earlier is installed and the service is actively running with RA processing enabled.

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
Upgrade available Upgrade to a release after 1.8.1
Interim mitigation

Upgrade radvd to version 1.8.2 or later to patch the buffer overflow. If immediate upgrade is not possible, consider restricting network access to trusted IPv6 neighbors or disabling radvd if not required.

Fix this in Router Advertisement Daemon Scoped from the published advisory
  • Consultation4.0 h
  • Implementation2.0 h
  • Testing3.0 h
  • Review / QA2.0 h
11.0 hours of engineering $1,970
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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-2011-3601 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
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