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Asa 5580Hardware / appliance · Cisco

CVE-2009-4922

MEDIUM · 6.8 CVSS v2.0 Published 2010-06-29
Fix available
A fix is available. Upgrade to after 8.1 or later.
See remediation →
74/100
Remediation priority · Elevated
Remotely reachable 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
Unspecified vulnerability on Cisco Adaptive Security Appliances (ASA) 5580 series devices with software before 8.1(2) allows remote authenticated users to cause a denial of service (traceback) by establishing many IPsec L2L tunnels from remote peer IP addresses, aka Bug ID CSCso15583.

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

Cisco ASA 5580 series devices running software versions before 8.1(2) contain an unspecified vulnerability where authenticated remote users can trigger a denial of service by establishing numerous IPsec L2L (LAN-to-LAN) tunnels from remote peer IP addresses, causing a traceback (system crash).

MitigationUpgrade Cisco ASA software to version 8.1(2) or later to patch this vulnerability. If immediate upgrade is not possible, limit and monitor the number of IPsec L2L tunnel establishments from remote peers.

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
Asa 5580Hardware / appliance
Affected:<= 8.1\(1\)

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
Single
Confidentiality
None
Integrity
None
Availability
Complete

AV:N/AC:L/Au:S/C:N/I:N/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 the device model
    Run 'show version' or 'show hardware' and look for 'ASA 5580' in the output
    Affected if Device model is Cisco ASA 5580 series
  2. Check the software version
    Run 'show version' and locate the software version number (for example, 8.1(1) or 8.2(1))
    Affected if Software version is 8.1(1) or earlier
  3. Verify IPsec L2L tunnel configuration
    Run 'show crypto ipsec sa' or 'show run crypto map' to check if LAN-to-LAN IPsec tunnels are configured
    Affected if Any L2L tunnel configuration exists (this is the attack vector)
  4. Check active tunnel count and status
    Run 'show crypto ipsec sa' and look at the 'current_peer' count and 'pkts encaps' counters
    Affected if Multiple active L2L tunnels are established or high tunnel negotiation activity is observed

Device is affected if it is a Cisco ASA 5580 running software version 8.1(1) or earlier and has IPsec L2L tunnels configured, as the vulnerability is triggered by numerous L2L tunnel establishments from remote peers.

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 8.1
Interim mitigation

Upgrade Cisco ASA software to version 8.1(2) or later to patch this vulnerability. If immediate upgrade is not possible, limit and monitor the number of IPsec L2L tunnel establishments from remote peers.

Fix this in Asa 5580 Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,130
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,408.

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-2009-4922 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