Privilege escalation in Cisco Web Security Appliance
CVE-2018-0428
A vulnerability in the account management subsystem of Cisco Web Security Appliance (WSA) could allow an authenticated, local attacker to elevate privileges to root. The attacker must authenticate with valid administrator credentials. The vulnerability is due to improper implementation of access controls. An attacker could exploit this vulnerability by authenticating to the device as a specific user to gain the information needed to elevate privileges to root in a separate login shell. A successful exploit could allow the attacker to escape the CLI subshell and execute system-level commands on the underlying operating system as root. Cisco Bug IDs: CSCvj93548.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (35.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Cisco Web Security Appliance — versions 11.0.0-fcs-250, 11.5.0-fcs-000, wsa10.0.0-959
- Cisco Systems, Inc. Web Security Appliance — versions unspecified
Weakness classification (CWE)
References
- www.securityfocus.com/bid/105104 (VDB Entry, Third Party Advisory, vdb-entry)
- www.securitytracker.com/id/1041536 (VDB Entry, Third Party Advisory, vdb-entry)
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180815… (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-0428?
- CVE-2018-0428 is a medium-severity vulnerability in Cisco Web Security Appliance, classified under Improper Access Control. CVSS score: 6.7/10. Published 2018-08-15.
- How severe is CVE-2018-0428?
- Medium severity. CVSS v3 base score is 6.7 out of 10.