dbcve.org
Adaptive Security Appliance SoftwareOperating system · Cisco

CVE-2024-20268

HIGH · 7.7 CVSS v3.1 Published 2024-10-23
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
83/100
Remediation priority · High
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
A vulnerability in the Simple Network Management Protocol (SNMP) feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to cause an unexpected reload of the device. This vulnerability is due to insufficient input validation of SNMP packets. An attacker could exploit this vulnerability by sending a crafted SNMP request to an affected device using IPv4 or IPv6. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability affects all versions of SNMP (versions 1, 2c, and 3) and requires a valid SNMP community string or valid SNMPv3 user credentials.

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

A vulnerability in the SNMP feature of Cisco ASA and FTD software due to insufficient input validation allows an authenticated attacker with valid SNMP credentials to send a crafted SNMP packet that causes an unexpected device reload, resulting in denial of service.

MitigationApply Cisco security updates for ASA and FTD software; restrict SNMP access to authorized management IPs and consider disabling SNMP if not required, or migrate to SNMPv3 with strong authentication/encryption.

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
Affected:= 9.14.1= 9.14.1.6= 9.14.1.10= 9.14.1.15= 9.14.1.19= 9.14.1.30= 9.14.2= 9.14.2.4= 9.14.2.8= 9.14.2.13= 9.14.2.15= 9.14.3
Secure Firewall Threat DefenseApplication
Affected:= 6.6.0= 6.6.0.1= 6.6.1= 6.6.3= 6.6.4= 6.6.5= 6.6.5.1= 6.6.5.2= 6.6.7= 6.6.7.1= 6.6.7.2= 6.7.0

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
Low
User interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High

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

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 device model and software type
    Log into the device and run 'show version' or check the device management interface to confirm if the device is running Cisco ASA Software or Cisco Firepower Threat Defense (FTD).
    Affected if The device is either Cisco ASA or FTD software.
  2. Check installed ASA version
    Run 'show version | include Version' on the ASA CLI to obtain the exact software version number.
    Affected if The version matches any of: 9.14.1, 9.14.1.6, 9.14.1.10, 9.14.1.15, 9.14.1.19, 9.14.1.30, 9.14.2, 9.14.2.4, 9.14.2.8, 9.14.2.13, 9.14.2.15, or 9.14.3.
  3. Check installed FTD version
    Run 'show version' or check the FTD management console to obtain the exact software version number.
    Affected if The version matches any of: 6.6.0, 6.6.0.1, 6.6.1, 6.6.3, 6.6.4, 6.6.5, 6.6.5.1, 6.6.5.2, 6.6.7, 6.6.7.1, 6.6.7.2, or 6.7.0.
  4. Verify SNMP is configured
    Run 'show run snmp-server' on the ASA/FTD CLI to check if any SNMP configuration exists (snmp-server commands).
    Affected if SNMP is enabled and configured with community strings or users.
  5. Check SNMP access control
    Review the SNMP configuration for any access lists or restricted management networks using 'show run all snmp-server | include access-list' or similar commands.
    Affected if SNMP is accessible from untrusted networks or there are no IP-based access restrictions.

The device is affected if it runs Cisco ASA Software versions 9.14.1-9.14.3 or FTD versions 6.6.0-6.7.0 AND has SNMP feature enabled with valid credentials configured.

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
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply Cisco security updates for ASA and FTD software; restrict SNMP access to authorized management IPs and consider disabling SNMP if not required, or migrate to SNMPv3 with strong authentication/encryption.

Fix this in Adaptive Security Appliance Software Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
10.0 hours of engineering $1,800
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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-2024-20268 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