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Adaptive Security Appliance SoftwareApplication · Cisco

CVE-2016-1445

MEDIUM · 5.3 CVSS v3.1 Published 2016-07-12
Fix available
A fix is available. Upgrade to 9.4.3.3 / 9.5.2.10 or later.
See remediation →
62/100
Remediation priority · Elevated
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
Cisco Adaptive Security Appliance (ASA) Software 8.2 through 9.4.3.3 allows remote attackers to bypass intended ICMP Echo Reply ACLs via vectors related to subtypes.

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 Software versions 8.2 through 9.4.3.3 contain a flaw where ICMP Echo Reply packets with certain subtypes can bypass configured ACLs that should block them, allowing remote attackers to potentially receive ICMP responses they should not have access to.

MitigationUpgrade Cisco ASA Software to a version beyond 9.4.3.3 (or apply the relevant patch) to remediate this ICMP ACL bypass vulnerability.

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 SoftwareApplication
Affected:>= 8.2, < 9.4.3.3>= 9.5.0, < 9.5.2.10>= 9.6.0, < 9.6.1.5

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
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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 installed Cisco ASA software version
    Log into the ASA CLI and execute 'show version'. Locate the software version line (typically shows as 'Cisco ASA Software Version X.Y.Z').
    Affected if The installed version falls within 8.2 to 9.4.3.3, 9.5.0 to 9.5.2.10, or 9.6.0 to 9.6.1.5
  2. Verify ICMP traffic is being filtered by ACLs
    Run 'show access-list' and search for entries matching 'icmp' or 'protocol 1'. Identify any ACLs applied to interfaces that filter inbound or outbound ICMP traffic.
    Affected if ACLs are configured to permit or deny ICMP traffic on any interface, making the bypass relevant

If the ASA runs an affected version and has ACLs controlling ICMP traffic, ICMP echo reply packets with certain subtypes may bypass those ACLs.

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 9.4.3.3 / 9.5.2.10 / 9.6.1.5 or later
Fixed in 9.4.3.39.5.2.109.6.1.5
Interim mitigation

Upgrade Cisco ASA Software to a version beyond 9.4.3.3 (or apply the relevant patch) to remediate this ICMP ACL bypass vulnerability.

Fix this in Adaptive Security Appliance Software Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,490
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.

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-2016-1445 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