SB2021032931 - Ubuntu update for webkit2gtk
Published: March 29, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 secuirty vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2020-27918)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when processing web content within WebKit. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger a use-after-free error and execute arbitrary code on the system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
2) Incomplete cleanup (CVE-ID: CVE-2020-29623)
The vulnerability allows an attacker to gain access to sensitive information.
The vulnerability exists due to software fails to to fully delete browsing history under certain circumstances via the “Clear History and Website Data” option. An attacker with access to the system can obtain browsing data after cleanup.
3) Security restrictions bypass (CVE-ID: CVE-2021-1765)
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to application does not properly impose sanboxing policy in WebKit. 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-2021-1789)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a type confusion error in WebKit. A remote attacker can trick the victim to open a specially crafted website, 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) Information disclosure (CVE-ID: CVE-2021-1799)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a port redirection issue in WebRTC. A remote attacker can gain unauthorized access to sensitive information, such as open ports in the local network.
6) Security restrictions bypass (CVE-ID: CVE-2021-1801)
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to application does not properly impose sanboxing policy in WebKit. A remote attacker can create a specially crafted web page, trick the victim into visiting it and bypass implemented security restrictions.
7) Business Logic Errors (CVE-ID: CVE-2021-1870)
The vulnerability allows a remote attacker to execute arbitrary code on the system.
The vulnerability exists due to a logic issue in the WebKit component. A remote attacker can trick a victim to visit a malicious website and execute arbitrary code on the system.
Note: The vulnerability is being actively exploited in the wild.
Remediation
Install update from vendor's website.