Adaptive Security Appliance SoftwareOperating system · Cisco
CVE-2013-3415
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 Appliance (ASA) Software 8.4.x before 8.4(3) and 8.6.x before 8.6(1.3) does not properly manage memory upon an AnyConnect SSL VPN client disconnection, which allows remote attackers to cause a denial of service (memory consumption, and forwarding outage or system hang) via packets to the disconnected machine's IP address, aka Bug ID CSCtt36737.
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 confidenceCisco ASA devices running versions 8.4.x before 8.4(3) and 8.6.x before 8.6(1.3) fail to properly release memory after an AnyConnect SSL VPN client disconnects. An attacker can send packets to the disconnected client's IP address, causing memory consumption that leads to a denial of service through forwarding outages or system hang.
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\(2.11\)= 8.6= 8.6\(1\)= 8.6\(1.10\)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
- 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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Check ASA software versionRun 'show version' on the ASA CLI to display the installed software versionAffected if The version displayed is 8.4.x before 8.4(3) or 8.6.x before 8.6(1.3), such as 8.4, 8.4(1), 8.4(2), 8.4(2.11), 8.6, 8.6(1), or 8.6(1.10)
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Verify AnyConnect SSL VPN is enabledRun 'show run webvpn' or 'show running-config webvpn' to check if AnyConnect VPN is configuredAffected if AnyConnect SSL VPN is enabled on the device
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Check for active or recent VPN sessionsRun 'show vpn-sessiondb anyconnect' to display active and recent AnyConnect sessionsAffected if There are any active sessions or recent session history indicating clients have connected and disconnected
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Monitor memory usageRun 'show memory' or 'show processes memory' to observe current memory consumptionAffected if Memory usage is abnormally high or steadily increasing, which may indicate the memory leak has been triggered
You are affected if the ASA runs version 8.4 before 8.4(3) or 8.6 before 8.6(1.3) and has AnyConnect SSL VPN enabled with history of client connections.
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(3), 8.6(1.3), or later to patch the memory management flaw.
Fix this in Adaptive Security Appliance Software
Scoped from the published advisory
- Consultation4.0 h
- Implementation3.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,680.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2013-3415 — 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-2013-3415 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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