Privilege escalation in Cisco Umbrella

CVE-2018-0438

A vulnerability in the Cisco Umbrella Enterprise Roaming Client (ERC) could allow an authenticated, local attacker to elevate privileges to Administrator. To exploit the vulnerability, the attacker must authenticate with valid local user credentials. This vulnerability is due to improper implementation of file system permissions, which could allow non-administrative users to place files within restricted directories. An attacker could exploit this vulnerability by placing an executable file within the restricted directory, which when executed by the ERC client, would run with Administrator privileges.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.014 (70.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

References

  • psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)
  • psirt@cisco.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
  • psirt@cisco.com (VDB Entry, Third Party Advisory, exploit, x_refsource_EXPLOIT-DB)

Frequently asked questions

What is CVE-2018-0438?
CVE-2018-0438 is a high-severity vulnerability in Cisco Umbrella, classified under Improper Input Validation. CVSS score: 7.8/10. Published 2018-10-05.
How severe is CVE-2018-0438?
High severity. CVSS v3 base score is 7.8 out of 10.