SB2020100517 - Red Hat Enterprise Linux 6 update for thunderbird
Published: October 5, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Buffer overflow (CVE-ID: CVE-2020-15673)
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 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.
2) Cross-site scripting (CVE-ID: CVE-2020-15676)
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to Firefox sometimes ran the onload handler for SVG elements that the DOM sanitizer decided to remove, resulting in JavaScript being executed after pasting attacker-controlled data into a contenteditable element.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
3) Spoofing attack (CVE-ID: CVE-2020-15677)
The vulnerability allows a remote attacker to perform spoofing attack.
The
vulnerability exists due to way Firefox displays name of the data
origin when downloading files. A remote attacker can spoof origin of the
downloaded file and display the name of the intermediate website instead of the original source name.
Successful exploitation of this
vulnerability may allow a remote attacker to perform a phishing attack but requires that the spoofed website has an open redirect vulnerability.
4) Use-after-free (CVE-ID: CVE-2020-15678)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when processing HTML content. When recursing through graphical layers while scrolling, an iterator may
have become invalid, resulting in a potential use-after-free. This
occurs because the function APZCTreeManager::ComputeClippedCompositionBounds did not follow iterator invalidation rules.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Remediation
Install update from vendor's website.