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Adaptive Security Appliance SoftwareOperating system · Cisco

CVE-2014-2127

HIGH · 8.5 CVSS v2.0 Published 2014-04-10
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
91/100
Remediation priority · Urgent
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
Cisco Adaptive Security Appliance (ASA) Software 8.x before 8.2(5.48), 8.3 before 8.3(2.40), 8.4 before 8.4(7.9), 8.6 before 8.6(1.13), 9.0 before 9.0(4.1), and 9.1 before 9.1(4.3) does not properly process management-session information during privilege validation for SSL VPN portal connections, which allows remote authenticated users to gain privileges by establishing a Clientless SSL VPN session and entering crafted URLs, aka Bug ID CSCul70099.

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

This is a privilege escalation vulnerability in Cisco ASA Software where the management-session information is not properly processed during privilege validation for SSL VPN portal connections. An authenticated remote attacker can establish a Clientless SSL VPN session and use crafted URLs to elevate their privileges beyond what they were assigned, gaining unauthorized access to additional resources or functionality.

MitigationUpgrade Cisco ASA Software to version 8.2(5.48) or later for the 8.x branch, 8.3(2.40) or later for 8.3, 8.4(7.9) or later for 8.4, 8.6(1.13) or later for 8.6, 9.0(4.1) or later for 9.0, or 9.1(4.3) or later for 9.1. Review SSL VPN user privilege assignments after patching.

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:= 8.0= 8.1= 8.2= 8.3\(1\)= 8.4= 8.6= 9.0= 9.1

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
M
Authentication
Single
Confidentiality
Complete
Integrity
Complete
Availability
Complete

AV:N/AC:M/Au:S/C:C/I:C/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify the Cisco ASA software version
    Run 'show version' on the ASA CLI or retrieve via SNMP/ASDM. Look for the software version number in the output.
    Affected if The version is 8.0, 8.1, 8.2, 8.3(1), 8.4, 8.6, 9.0, or 9.1 (any release within these branches before the fixed versions)
  2. Verify Clientless SSL VPN is enabled
    Run 'show vpn-sessiondb' or 'show webvpn' on the ASA CLI. Look for active Clientless SSL VPN sessions or check configuration with 'show run webvpn'.
    Affected if Clientless SSL VPN is active and users have authenticated sessions using the portal
  3. Check SSL VPN group policy privilege assignments
    Run 'show run group-policy' and 'show run username' to inspect the attributes assigned to SSL VPN users. Look for privilege-level or attribute configurations.
    Affected if Users have limited privileges assigned that could be elevated through the vulnerability
  4. Review active SSL VPN session attributes
    Use 'show vpn-sessiondb webvpn' to view active sessions and their associated group policies or tunnel groups.
    Affected if There are active Clientless SSL VPN sessions using group policies with restricted access

The environment is affected if the Cisco ASA runs a vulnerable 8.x or 9.x version AND has Clientless SSL VPN enabled with users assigned restricted privileges that could be escalated via crafted URLs.

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

Upgrade Cisco ASA Software to version 8.2(5.48) or later for the 8.x branch, 8.3(2.40) or later for 8.3, 8.4(7.9) or later for 8.4, 8.6(1.13) or later for 8.6, 9.0(4.1) or later for 9.0, or 9.1(4.3) or later for 9.1. Review SSL VPN user privilege assignments after patching.

Fix this in Adaptive Security Appliance Software Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
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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-2014-2127 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
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  • Version or environment caveats, and links to real fixes
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