SB2019090307 - Multiple vulnerabilities in Mozilla Firefox ESR
Published: September 3, 2019
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 secuirty vulnerabilities.
1) 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.
2) 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
3) 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.
4) 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.
5) 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.
6) 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.
7) 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.
8) 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.