Vulnerabilities > CVE-2018-0428 - Improper Privilege Management vulnerability in Cisco web Security Appliance
Attack vector
LOCAL Attack complexity
LOW Privileges required
NONE Confidentiality impact
COMPLETE Integrity impact
COMPLETE Availability impact
COMPLETE Summary
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.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Hardware | 4 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Restful Privilege Elevation Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
Nessus
NASL family CISCO NASL id CISCO_SA_20180815_WSA_CVE_2018_0428.NASL description According to its self-reported version, the Cisco Web Security Appliance (WSA) running on the remote host may be affected by privilege escalation vulnerability. last seen 2020-06-01 modified 2020-06-02 plugin id 112122 published 2018-08-27 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/112122 title Cisco Web Security Appliance Privilege Escalation Vulnerability. code #TRUSTED 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 # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(112122); script_version("1.8"); script_cvs_date("Date: 2019/12/20"); script_cve_id("CVE-2018-0428"); script_bugtraq_id(105104); script_xref(name:"CISCO-BUG-ID", value:"CSCvj93548"); script_xref(name:"CISCO-SA", value:"cisco-sa-20180815-wsa-escalation"); script_name(english:"Cisco Web Security Appliance Privilege Escalation Vulnerability."); script_summary(english:"Checks the WSA version."); script_set_attribute(attribute:"synopsis", value: "The remote security appliance may be affected by a privilege escalation vulnerability."); script_set_attribute(attribute:"description", value: "According to its self-reported version, the Cisco Web Security Appliance (WSA) running on the remote host may be affected by privilege escalation vulnerability."); # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180815-wsa-escalation script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?87dd52c9"); # https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvj93548 script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b9bd6384"); script_set_attribute(attribute:"solution", value: "Apply the vendor supplied patch."); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-0428"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"vuln_publication_date", value:"2018/08/15"); script_set_attribute(attribute:"patch_publication_date", value:"2018/08/15"); script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/27"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/h:cisco:web_security_appliance"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"CISCO"); script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("cisco_wsa_version.nasl"); script_require_keys("Host/AsyncOS/Cisco Web Security Appliance/DisplayVersion"); exit(0); } include("audit.inc"); include("cisco_workarounds.inc"); include("ccf.inc"); product_info = cisco::get_product_info(name:"Cisco Web Security Appliance (WSA)"); workarounds = make_list(CISCO_WORKAROUNDS["no_workaround"]); workaround_params = make_list(); # 11.0.0-FCS-250, 11.5.0-FCS-000, WSA10.0.0-959, WSA10.5.0-FCS-000 vuln_versions = make_list( "11.0.0.250", "11.5.0.0", "10.0.0.959", "10.5.0.0"); reporting = make_array( "port" , 0, "severity" , SECURITY_HOLE, 'bug_id' , "CSCvj93548", "version" , product_info["display_version"], "fix" , "See advisory" ); cisco::check_and_report(product_info:product_info, workarounds:workarounds, workaround_params:workaround_params, reporting:reporting, vuln_versions:vuln_versions);NASL family CISCO NASL id CISCO_SA_20180815_WSA_CVE_2018_0410.NASL description According to its self-reported version, the Cisco Web Security Appliance (WSA) running on the remote host may be affected by multiple vulnerabilities. last seen 2020-06-01 modified 2020-06-02 plugin id 112121 published 2018-08-27 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/112121 title Cisco Web Security Appliance Multiple Vulnerabilities.