Adaptive Security Appliance SoftwareOperating system · Cisco
CVE-2012-0355
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 · uneditedCisco Adaptive Security Appliances (ASA) 5500 series devices, and the ASA Services Module (ASASM) in Cisco Catalyst 6500 series devices, with software 8.4 before 8.4(2.11) and 8.5 before 8.5(1.4) allow remote attackers to cause a denial of service (device reload) via (1) IPv4 or (2) IPv6 packets that trigger syslog message 305006, aka Bug ID CSCts39634.
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 confidenceDenial of service vulnerability in Cisco ASA 5500 series devices and ASA Services Module in Catalyst 6500 series. Remote attackers can send specially crafted IPv4 or IPv6 packets that trigger syslog message 305006, causing the device to reload. The vulnerability affects software 8.4 before 8.4(2.11) and 8.5 before 8.5(1.4).
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
Adaptive Security Appliance SoftwareOperating system
= 8.4= 8.4\(1\)= 8.4\(1.11\)= 8.4\(2\)= 8.4\(2.11\)= 8.5= 8.5\(1\)= 8.5\(1.4\)
5500 Series Adaptive Security ApplianceHardware / appliance
all versions
Catalyst 6500Hardware / appliance
all versions
Catalyst 6503 EHardware / appliance
all versions
Catalyst 6504 EHardware / appliance
all versions
Catalyst 6506 EHardware / appliance
all versions
Catalyst 6509 EHardware / appliance
all versions
Catalyst 6509 Neb AHardware / appliance
all versionsCVSS 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
- None
- Integrity
- None
- Availability
- Complete
AV:N/AC:L/Au:N/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 checksWork through these to decide whether this CVE applies to you.
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Identify the device modelRun 'show version' or 'show hardware' command to confirm the device is a Cisco ASA 5500 series or Catalyst 6500 series with ASA Services ModuleAffected if Device is not an ASA 5500 series or Catalyst 6500 with ASA module - not affected
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Check the ASA software versionRun 'show version' and locate the ASA software version number in the outputAffected if Running version 8.4 before 8.4(2.11) or 8.5 before 8.5(1.4) - potentially affected
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Verify IPv4 or IPv6 is enabledRun 'show interface' or 'show ip interface' to confirm IPv4 or IPv6 is configured on any interfaceAffected if IPv4 or IPv6 is enabled - device can receive the crafted packets that trigger the vulnerability
Device is affected if it is a Cisco ASA 5500 series or Catalyst 6500 with ASA Services Module running software version 8.4 before 8.4(2.11) or 8.5 before 8.5(1.4), and has IPv4 or IPv6 interfaces enabled.
Generated from the published advisory. Verify against your own configuration.
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 dataUpgrade Cisco ASA software to version 8.4(2.11) or later, or 8.5(1.4) or later. If immediate upgrade is not possible, consider network-level filtering to limit exposure to untrusted networks.
Fix this in Adaptive Security Appliance Software
Scoped from the published advisory
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,272.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2012-0355 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2012-0355 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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