Vulnerabilities > CVE-2016-2809 - Permissions, Privileges, and Access Controls vulnerability in Mozilla Firefox
Attack vector
NETWORK Attack complexity
MEDIUM Privileges required
NONE Confidentiality impact
NONE Integrity impact
PARTIAL Availability impact
PARTIAL Summary
The Mozilla Maintenance Service updater in Mozilla Firefox before 46.0 on Windows allows user-assisted remote attackers to delete arbitrary files by leveraging certain local file execution.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Accessing, Modifying or Executing Executable Files An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
- Leverage Executable Code in Non-Executable Files An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
- Blue Boxing This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
- 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.
- Target Programs with Elevated Privileges This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.
Nessus
NASL family SuSE Local Security Checks NASL id OPENSUSE-2016-566.NASL description This update to Mozilla Firefox 46.0 fixes several security issues and bugs (boo#977333). The following vulnerabilities were fixed : - CVE-2016-2804: Miscellaneous memory safety hazards - MFSA 2016-39 (boo#977373) - CVE-2016-2806: Miscellaneous memory safety hazards - MFSA 2016-39 (boo#977375) - CVE-2016-2807: Miscellaneous memory safety hazards - MFSA 2016-39 (boo#977376) - CVE-2016-2808: Write to invalid HashMap entry through JavaScript.watch() - MFSA 2016-47 (boo#977386) - CVE-2016-2811: Use-after-free in Service Worker - MFSA 2016-42 (boo#977379) - CVE-2016-2812: Buffer overflow in Service Worker - MFSA 2016-42 (boo#977379) - CVE-2016-2814: Buffer overflow in libstagefright with CENC offsets - MFSA 2016-44 (boo#977381) - CVE-2016-2816: CSP not applied to pages sent with multipart/x-mixed-replace - MFSA 2016-45 (boo#977382) - CVE-2016-2817: Elevation of privilege with chrome.tabs.update API in web extensions - MFSA 2016-46 (boo#977384) - CVE-2016-2820: Firefox Health Reports could accept events from untrusted domains - MFSA 2016-48 (boo#977388) The following miscellaneous changes are included : - Improved security of the JavaScript Just In Time (JIT) Compiler - WebRTC fixes to improve performance and stability - Added support for document.elementsFromPoint - Added HKDF support for Web Crypto API The minimum requirements increased to NSPR 4.12 and NSS 3.22.3. Mozilla NSS was updated to 3.22.3 as a dependency for Mozilla Firefox 46.0, with the following changes : - Increase compatibility of TLS extended master secret, don last seen 2020-06-05 modified 2016-05-12 plugin id 91069 published 2016-05-12 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/91069 title openSUSE Security Update : Firefox 46.0 (openSUSE-2016-566) (SWEET32) NASL family Windows NASL id MOZILLA_FIREFOX_46.NASL description The version of Firefox installed on the remote Windows host is prior to 46. It is, therefore, affected by multiple vulnerabilities : - Multiple memory corruption issues exist that allow an attacker to corrupt memory, resulting in the execution of arbitrary code. (CVE-2016-2804, CVE-2016-2806, CVE-2016-2807) - A flaw exists due to improper validation of user-supplied input when handling the 32-bit generation count of the underlying HashMap. A context-dependent attacker can exploit this to cause a buffer overflow condition, resulting in a denial of service or the execution of arbitrary code. (CVE-2016-2808) - A local privilege escalation vulnerability exists in the Maintenance Service updater due to improper handling of long log file paths. A local attacker can exploit this to delete arbitrary files and gain elevated privileges. (CVE-2016-2809) - A remote code execution vulnerability exists due to a use-after-free error in the BeginReading() function. A context-dependent attacker can exploit this to dereference already freed memory, resulting in the execution of arbitrary code. (CVE-2016-2811) - A remote code execution vulnerability exists due to a race condition in ServiceWorkerManager in the get() function. A context-dependent attacker can exploit this to execute arbitrary code. (CVE-2016-2812) - A heap buffer overflow condition exists in the Google Stagefright component due to improper validation of user-supplied input when handling CENC offsets and the sizes table. A context-dependent attacker can exploit this to cause a denial of service condition or the execution of arbitrary code. (CVE-2016-2814) - A security bypass vulnerability exists due to the Content Security Policy (CSP) not being properly applied to web content sent with the last seen 2020-06-01 modified 2020-06-02 plugin id 90793 published 2016-04-29 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/90793 title Firefox < 46 Multiple Vulnerabilities NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201701-15.NASL description The remote host is affected by the vulnerability described in GLSA-201701-15 (Mozilla Firefox, Thunderbird: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Mozilla Firefox and Thunderbird. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could possibly execute arbitrary code with the privileges of the process or cause a Denial of Service condition via multiple vectors. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 96276 published 2017-01-04 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/96276 title GLSA-201701-15 : Mozilla Firefox, Thunderbird: Multiple vulnerabilities (SWEET32)