SB2020122112 - Red Hat Enterprise Linux 7 update for thunderbird
Published: December 21, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 secuirty vulnerabilities.
1) Use of uninitialized resource (CVE-ID: CVE-2020-16042)
The vulnerability allows a remote attacker to bypass certain security restrictions.
The vulnerability exists due to usage of uninitialized resources in V8 in Google Chrome. A remote attacker can trick the victim to visit a specially crafted webpage, trigger uninitialized usage of resources and bypass implemented security mechanisms.
2) Heap-based buffer overflow (CVE-ID: CVE-2020-26971)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within WebGL component. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
3) Input validation error (CVE-ID: CVE-2020-26973)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to insufficient validation of user-supplied input within CSS Sanitizer. A remote attacker can create a specially crafted web page, trick the victim into visiting it, and bypass implemented security restrictions.
4) Type Confusion (CVE-ID: CVE-2020-26974)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a type confusion error. When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger a type confusion error and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
5) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2020-26978)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to application does not properly impose security restrictions. A remote attacker can create a specially crafted webpage and send probes to hosts in internal network as well as to services on the user's local machine.
6) Information disclosure (CVE-ID: CVE-2020-35111)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to the proxy.onRequest API does not use proxy when viewing source code of the web application. A remote attacker, who controls the web server can obtain user's real IP address, if the user decides to view the web application source code while behind a proxy server.
7) Buffer overflow (CVE-ID: CVE-2020-35113)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted website, 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.