Vulnerabilities > CVE-2017-7817 - Improper Input Validation vulnerability in Mozilla Firefox
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
PARTIAL Availability impact
NONE Summary
A spoofing vulnerability can occur when a page switches to fullscreen mode without user notification, allowing a fake address bar to be displayed. This allows an attacker to spoof which page is actually loaded and in use. Note: This attack only affects Firefox for Android. Other operating systems are not affected. This vulnerability affects Firefox < 56.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Server Side Include (SSI) Injection An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
- Cross Zone Scripting An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
- Cross Site Scripting through Log Files An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
- Command Line Execution through SQL Injection An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.
Nessus
NASL family Windows NASL id MOZILLA_FIREFOX_56_0.NASL description The version of Mozilla Firefox installed on the remote Windows host is prior to 56. It is, therefore, affected by multiple vulnerabilities, some of which allow code execution and potentially exploitable crashes. last seen 2020-06-01 modified 2020-06-02 plugin id 103680 published 2017-10-06 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103680 title Mozilla Firefox < 56 Multiple Vulnerabilities code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(103680); script_version("1.4"); script_cvs_date("Date: 2019/11/12"); script_cve_id( "CVE-2017-7793", "CVE-2017-7805", "CVE-2017-7810", "CVE-2017-7811", "CVE-2017-7812", "CVE-2017-7813", "CVE-2017-7814", "CVE-2017-7815", "CVE-2017-7816", "CVE-2017-7817", "CVE-2017-7818", "CVE-2017-7819", "CVE-2017-7820", "CVE-2017-7821", "CVE-2017-7822", "CVE-2017-7823", "CVE-2017-7824" ); script_bugtraq_id( 101053, 101054, 101055, 101057 ); script_xref(name:"MFSA", value:"2017-21"); script_name(english:"Mozilla Firefox < 56 Multiple Vulnerabilities"); script_summary(english:"Checks the version of Firefox."); script_set_attribute(attribute:"synopsis", value: "A web browser installed on the remote Windows host is affected by multiple vulnerabilities."); script_set_attribute(attribute:"description", value: "The version of Mozilla Firefox installed on the remote Windows host is prior to 56. It is, therefore, affected by multiple vulnerabilities, some of which allow code execution and potentially exploitable crashes."); script_set_attribute(attribute:"see_also", value:"https://www.mozilla.org/en-US/security/advisories/mfsa2017-21/"); script_set_attribute(attribute:"solution", value: "Upgrade to Mozilla Firefox version 56 or later."); script_set_cvss_base_vector("CVSS2#AV:N/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:N/AC:L/PR:N/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-2017-7811"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"exploit_available", value:"false"); script_set_attribute(attribute:"vuln_publication_date", value:"2017/09/28"); script_set_attribute(attribute:"patch_publication_date", value:"2017/09/28"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/10/06"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/a:mozilla:firefox"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"Windows"); script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("mozilla_org_installed.nasl"); script_require_keys("Mozilla/Firefox/Version"); exit(0); } include("mozilla_version.inc"); port = get_kb_item("SMB/transport"); if (!port) port = 445; installs = get_kb_list("SMB/Mozilla/Firefox/*"); if (isnull(installs)) audit(AUDIT_NOT_INST, "Firefox"); mozilla_check_version(installs:installs, product:'firefox', fix:'56', severity:SECURITY_HOLE);NASL family MacOS X Local Security Checks NASL id MACOSX_FIREFOX_56_0.NASL description The version of Mozilla Firefox installed on the remote macOS or Mac OS X host is prior to 56. It is, therefore, affected by multiple vulnerabilities, some of which allow code execution and potentially exploitable application crashes. last seen 2020-06-01 modified 2020-06-02 plugin id 103678 published 2017-10-06 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103678 title Mozilla Firefox < 56 Multiple Vulnerabilities (macOS) NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_1098A15BB0F642B7B5C78A8646E8BE07.NASL description Mozilla Foundation reports : CVE-2017-7793: Use-after-free with Fetch API CVE-2017-7817: Firefox for Android address bar spoofing through fullscreen mode CVE-2017-7818: Use-after-free during ARIA array manipulation CVE-2017-7819: Use-after-free while resizing images in design mode CVE-2017-7824: Buffer overflow when drawing and validating elements with ANGLE CVE-2017-7805: Use-after-free in TLS 1.2 generating handshake hashes CVE-2017-7812: Drag and drop of malicious page content to the tab bar can open locally stored files CVE-2017-7814: Blob and data URLs bypass phishing and malware protection warnings CVE-2017-7813: Integer truncation in the JavaScript parser CVE-2017-7825: OS X fonts render some Tibetan and Arabic unicode characters as spaces CVE-2017-7815: Spoofing attack with modal dialogs on non-e10s installations CVE-2017-7816: WebExtensions can load about: URLs in extension UI CVE-2017-7821: WebExtensions can download and open non-executable files without user interaction CVE-2017-7823: CSP sandbox directive did not create a unique origin CVE-2017-7822: WebCrypto allows AES-GCM with 0-length IV CVE-2017-7820: Xray wrapper bypass with new tab and web console CVE-2017-7811: Memory safety bugs fixed in Firefox 56 CVE-2017-7810: Memory safety bugs fixed in Firefox 56 and Firefox ESR 52.4 last seen 2020-06-01 modified 2020-06-02 plugin id 103556 published 2017-09-29 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103556 title FreeBSD : mozilla -- multiple vulnerabilities (1098a15b-b0f6-42b7-b5c7-8a8646e8be07)