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iOSOperating system · Cisco

CVE-2010-0581

HIGH · 10.0 CVSS v2.0 Published 2010-03-25
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
100/100
Remediation priority · Urgent
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
Unspecified vulnerability in the SIP implementation in Cisco IOS 12.3 and 12.4 allows remote attackers to execute arbitrary code via a malformed SIP message, aka Bug ID CSCsz89904, the "SIP Packet Parsing Arbitrary Code Execution Vulnerability."

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

A detailed technical summary for this CVE is being prepared.

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
iOSOperating system
Affected:= 12.3jk= 12.3t= 12.3xd= 12.3xf= 12.3xg= 12.3xi= 12.3xj= 12.3xk= 12.3xl= 12.3xq= 12.3xr= 12.3xu

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
Complete
Integrity
Complete
Availability
Complete

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

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
Patch available Apply the vendor patch
Vendor patch tools.cisco.com →
Recommended fix High confidence

Cisco IOS 12.4T family (or later recommended by Cisco Security Advisory for respective 12.3/12.4 trains)

  1. 1. Access Cisco IOS upgrade path by visiting the Cisco Software Checker or contacting Cisco TAC
  2. 2. Identify the current exact Cisco IOS version and train running on the device using 'show version' command
  3. 3. Navigate to the Cisco Security Advisory at http://tools.cisco.com/security/center/viewAlert.x?alertId=20065 for the specific fixed releases
  4. 4. Download and verify the appropriate Cisco IOS image from the fixed release train that corresponds to your current train (12.3 or 12.4)
  5. 5. Plan maintenance window and backup current configuration using 'write memory' and 'copy running-config tftp'
  6. 6. Upgrade Cisco IOS using standard upgrade procedures (copy new image to flash, set boot system, reload)
  7. 7. Verify the device boots with the new IOS version using 'show version'
  8. 8. Test SIP functionality to ensure the fix does not impact legitimate SIP operations
Caveat IOS upgrades between major trains may introduce command syntax changes; verify configuration compatibility and review release notes before upgrading

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

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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-2010-0581 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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