CVE intelligence and bounded remediation

CVE-2017-3813 — Cisco Anyconnect Secure Mobility Client security vulnerability

High CVSS 7.8

A vulnerability in the Start Before Logon (SBL) module of Cisco AnyConnect Secure Mobility Client Software for Windows could allow an unauthenticated, local attacker to open Internet Explorer with the privileges of the SYSTEM user. The vulnerability is due to insufficient implementation of the access controls. An attacker could exploit this vulnerability by opening the Internet Explorer browser. An exploit could allow the attacker to use Internet Explorer with the privileges of the SYSTEM user. This may allow the attacker to execute privileged commands on the targeted system. This vulnerability affects versions prior to released versions 4.4.00243 and later and 4.3.05017 and later. Cisco Bug IDs: CSCvc43976.

Severity
High
CVSS
7.8 (3.0)
Published
2017-02-09
CISA KEV
Not currently listed
Ecosystem
windows/system
Weaknesses
CWE-264, CWE-862

Affected products

  • cisco / anyconnect_secure_mobility_client / 4.0.00048
  • cisco / anyconnect_secure_mobility_client / 4.0.00051
  • cisco / anyconnect_secure_mobility_client / 4.0.00052
  • cisco / anyconnect_secure_mobility_client / 4.0.00057
  • cisco / anyconnect_secure_mobility_client / 4.0.00061
  • cisco / anyconnect_secure_mobility_client / 4.1.00028

Showing 6 representative product identities from 25 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Authorization bypass, IDOR, and cross-tenant access

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Map object and action authorization checks across API, UI, batch, import/export, and background-job paths.
  • Identify tenant, ownership, role, and policy boundaries for affected resources and administrative operations.
  • Use synthetic fixtures to compare intended access matrices without accessing another user's real data.

Remediate safely

  • Enforce server-side authorization at each resource access and state transition using the authenticated principal and trusted tenant context.
  • Scope data queries by tenant and ownership; treat client-supplied identifiers, roles, and policy claims as untrusted.
  • Add deny-by-default policy tests for horizontal and vertical access across every affected transport.

Authoritative sources

Complete CVE record and remediation plan

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