Vulnerability Details : 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.
Vulnerability category: BypassGain privilege
Products affected by CVE-2018-0428
- cpe:2.3:h:cisco:web_security_appliance:11.5.0-fcs-000:*:*:*:*:*:*:*
- cpe:2.3:h:cisco:web_security_appliance:wsa10.5.0-fcs-000:*:*:*:*:*:*:*
- cpe:2.3:h:cisco:web_security_appliance:11.0.0-fcs-250:*:*:*:*:*:*:*
- cpe:2.3:h:cisco:web_security_appliance:wsa10.0.0-959:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-0428
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-0428
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
7.2
|
HIGH | AV:L/AC:L/Au:N/C:C/I:C/A:C |
3.9
|
10.0
|
NIST | |
6.7
|
MEDIUM | CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
0.8
|
5.9
|
NIST |
CWE ids for CVE-2018-0428
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The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.Assigned by: nvd@nist.gov (Primary)
-
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.Assigned by: ykramarz@cisco.com (Secondary)
References for CVE-2018-0428
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http://www.securityfocus.com/bid/105104
Cisco Web Security Appliance CVE-2018-0428 Local Privilege Escalation VulnerabilityThird Party Advisory;VDB Entry
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https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180815-wsa-escalation
Cisco Web Security Appliance Privilege Escalation VulnerabilityVendor Advisory
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http://www.securitytracker.com/id/1041536
Cisco Web Security Appliance Access Control Flaw Lets Local Users Gain Root Privileges - SecurityTrackerThird Party Advisory;VDB Entry
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