SB2019090306 - Multiple vulnerabilities in Mozilla Firefox ESR
Published: September 3, 2019
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 16 secuirty vulnerabilities.
1) OS Command Injection (CVE-ID: CVE-2019-11751)
The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.
The vulnerability exists due to improper sanitization of logging-related command line parameters, when launching Firefox from another application. A remote attacker can create a specially crafted link, trick the victim to click on the link within an external application (e.g. messenger application) and write a log file to arbitrary location on the system, such as "Startup" folder. As a result a remote attacker can execute arbitrary code on the system.
2) Use-after-free (CVE-ID: CVE-2019-11746)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error while manipulating video elements if the body is freed while still in use. A remote attacker can create a specially crafted website, trick the victim into visiting it, trigger use-after-free error and execute arbitrary code on the target system with privileges of the current user.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
3) Cross-site scripting (CVE-ID: CVE-2019-11744)
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data within
4) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-11742)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to the way the same origin policy is applied to cached images in a combination of SVG filters and a element. A remote attacker can violate same-origin policy and access images from another domain.
5) Windows Hard Link (CVE-ID: CVE-2019-11736)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to the Mozilla Maintenance Service does not guard against files being hardlinked to another file in the updates directory. A local user can create a hardlink to a privileged file and replace it with malicious one. Successful exploitation of the vulnerability may allow a local us to escalate privileges on the system.
Note, the vulnerability affects Windows installation only.
6) Improper validation of integrity check value (CVE-ID: CVE-2019-11753)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to the Mozilla Maintenance Service does not check integrity of the binary files that were installed into a custom and unprotected folder on the system. A local user can manipulate the Mozilla Maintenance Service to update this unprotected location and escalate privilege on the system.
Note, the vulnerability affects Windows installation only.
7) Use-after-free (CVE-ID: CVE-2019-11752)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when extracting a key value in IndexedDB. A remote attacker can create specially crafted webpage, trick the victim into visiting it, trigger a user-after-free error by deleting the IndexedDB key value and subsequently make the application try to extract it during conversion.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
8) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-9812)
The vulnerability allows a remote attacker to escape sandbox restrictions.
The vulnerability exists due to a combination of issues related to a compromised sandboxed content and the Firefox Sync ability to synchronize data with the malicious account. A remote attacker can can compromise a sandboxed content process using a different vulnerability, and then escape that sandbox by loading accounts.firefox.com in that process and forcing a log-in to a malicious Firefox Sync account. Preference settings that disable the sandbox are then synchronized to the local machine and the compromised browser would restart without the sandbox if a crash is triggered.
9) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-11743)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to incorrect implementation of the unload event. A remote attacker can create a specially crafted web page, trick the victim into visiting and gain access to user's history through timing side-channel attacks.
10) Incorrect permission assignment for critical resource (CVE-ID: CVE-2019-11748)
The vulnerability allows a remote attacker to collect sensitive information.
The vulnerability exists due to the WebRTC in Firefox honors persisted permissions given to sites for access to microphone and camera resources even when in a third-party context. A remote attacker that can create a specially crafted webpage that loads a trusted resource and trick the browser into allowing usage of microphone and camera resources.
11) Information disclosure (CVE-ID: CVE-2019-11749)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to an error in WebRTC that allows malicious web content use probing techniques on the getUserMedia API with constraints to reveal device properties of cameras on the system without triggering a user prompt or notification. A remote attacker can use such behavior to fingerprint users.
12) Type Confusion (CVE-ID: CVE-2019-11750)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a type confusion error in Spidermonkey. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger a type confusion error and crash the affected application.
13) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-11738)
The vulnerability allows a remote attacker to bypass CSP.
The vulnerability exists due to incorrect processing of Content Security Policy (CSP) directive if a hash-based source takes the empty string as input, that leads to execution of any javascript: URIs.
14) Resource management error (CVE-ID: CVE-2019-11747)
The vulnerability makes HSTS feature ineffective.
The vulnerability exists due to incorrect implementation of the "Forget about this site" feature in the History pane, intended to remove all saved user data that indicates a user has visited a site. This includes removing any HTTP Strict Transport Security (HSTS) settings received from sites that use it. Due to a bug, sites on the pre-load list also have their HSTS setting removed. On the next visit to that site if the user specifies an http: URL rather than secure https: they will not be protected by the pre-loaded HSTS setting. After that visit the site's HSTS setting will be restored.
15) Buffer overflow (CVE-ID: CVE-2019-11735)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to boundary errors when processing HTML content. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
16) Buffer overflow (CVE-ID: CVE-2019-11740)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to boundary errors when processing HTML content. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.