Vulnerabilities > CVE-2019-1762 - Information Exposure vulnerability in Cisco IOS and IOS XE
Attack vector
LOCAL Attack complexity
LOW Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
NONE Availability impact
NONE Summary
A vulnerability in the Secure Storage feature of Cisco IOS and IOS XE Software could allow an authenticated, local attacker to access sensitive system information on an affected device. The vulnerability is due to improper memory operations performed at encryption time, when affected software handles configuration updates. An attacker could exploit this vulnerability by retrieving the contents of specific memory locations of an affected device. A successful exploit could result in the disclosure of keying materials that are part of the device configuration, which can be used to recover critical system information.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Subverting Environment Variable Values The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
- Footprinting An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
- Exploiting Trust in Client (aka Make the Client Invisible) An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
- Browser Fingerprinting An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
- Session Credential Falsification through Prediction This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.
Nessus
NASL family CISCO NASL id CISCO-SA-20190327-INFO-IOSXE.NASL description According to its self-reported version, Cisco IOS XE Software is affected by an unspecified vulnerability in the Secure Storage feature of Cisco IOS XE that allows an authenticated, local attacker to access sensitive system information on an affected device. The vulnerability is due to improper memory operations performed at encryption time, when affected software handles configuration updates. An attacker can exploit this vulnerability by retrieving the contents of specific memory locations of an affected device. A successful exploit could result in the disclosure of keying materials that are part of the device configuration, which can be used to recover critical system information. (CVE-2019-1762) Please see the included Cisco BID and Cisco Security Advisory for more information. last seen 2020-06-01 modified 2020-06-02 plugin id 127099 published 2019-07-29 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127099 title Cisco IOS XE Software Information Disclosure Vulnerability (cisco-sa-20190327-info) code #TRUSTED 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 # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(127099); script_version("1.4"); script_cvs_date("Date: 2019/12/20"); script_cve_id("CVE-2019-1762"); script_bugtraq_id(107594); script_xref(name:"IAVA", value:"2019-A-0264"); script_xref(name:"CISCO-BUG-ID", value:"CSCvi66418"); script_xref(name:"CISCO-SA", value:"cisco-sa-20190327-info"); script_name(english:"Cisco IOS XE Software Information Disclosure Vulnerability (cisco-sa-20190327-info)"); script_summary(english:"Checks the version of Cisco IOS XE Software"); script_set_attribute(attribute:"synopsis", value: "The remote device is missing a vendor-supplied security patch."); script_set_attribute(attribute:"description", value: "According to its self-reported version, Cisco IOS XE Software is affected by an unspecified vulnerability in the Secure Storage feature of Cisco IOS XE that allows an authenticated, local attacker to access sensitive system information on an affected device. The vulnerability is due to improper memory operations performed at encryption time, when affected software handles configuration updates. An attacker can exploit this vulnerability by retrieving the contents of specific memory locations of an affected device. A successful exploit could result in the disclosure of keying materials that are part of the device configuration, which can be used to recover critical system information. (CVE-2019-1762) Please see the included Cisco BID and Cisco Security Advisory for more information."); # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190327-info script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?314cb57a"); script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvi66418"); script_set_attribute(attribute:"solution", value: "Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvi66418."); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N"); 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:N/A:N"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-1762"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_cwe_id(200); script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/27"); script_set_attribute(attribute:"patch_publication_date", value:"2019/03/27"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/07/29"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ios_xe"); script_set_attribute(attribute:"stig_severity", value:"I"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"CISCO"); script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("cisco_ios_xe_version.nasl"); script_require_keys("Host/Cisco/IOS-XE/Version"); exit(0); } include('audit.inc'); include('cisco_workarounds.inc'); include('ccf.inc'); product_info = cisco::get_product_info(name:'Cisco IOS XE Software'); version_list = make_list( '16.6.1', '16.6.2', '16.6.3', '16.6.4', '16.6.4a', '16.6.4s', '16.7.1', '16.7.1a', '16.7.1b', '16.7.2', '16.7.3', '16.8.1', '16.8.1a', '16.8.1b', '16.8.1c', '16.8.1d', '16.8.1e', '16.8.1s', '16.8.2', '16.9.1', '16.9.1a', '16.9.1b', '16.9.1c', '16.9.1d', '16.9.1s', '16.9.2a' ); workarounds = make_list(CISCO_WORKAROUNDS['service_private_config_encryption']); workaround_params = make_list(); reporting = make_array( 'port' , 0, 'severity' , SECURITY_NOTE, 'version' , product_info['version'], 'bug_id' , 'CSCvi66418', 'cmds' , make_list('show running-config all | include service private-config-encryption') ); cisco::check_and_report(product_info:product_info, workarounds:workarounds, workaround_params:workaround_params, reporting:reporting, vuln_versions:version_list);NASL family CISCO NASL id CISCO-SA-20190327-INFO-IOS.NASL description According to its self-reported version, Cisco IOS Software is affected by an unspecified vulnerability in the Secure Storage feature of Cisco IOS that allows an authenticated, local attacker to access sensitive system information on an affected device. The vulnerability is due to improper memory operations performed at encryption time, when affected software handles configuration updates. An attacker can exploit this vulnerability by retrieving the contents of specific memory locations of an affected device. A successful exploit could result in the disclosure of keying materials that are part of the device configuration, which can be used to recover critical system information. (CVE-2019-1762) Please see the included Cisco BID and Cisco Security Advisory for more information. last seen 2020-06-01 modified 2020-06-02 plugin id 127098 published 2019-07-29 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127098 title Cisco IOS Software Information Disclosure Vulnerability (cisco-sa-20190327-info)