Multiple vulnerabilities in WebKitGTK and WPE WebKit

1) Use-after-free

EUVDB-ID: #VU48190

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-27918

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WPE WebKit: 2.19.93 - 2.31.90

WebKitGTK+: 2.0.0 - 2.31.90

CPE2.3

External links

http://webkitgtk.org/security/WSA-2021-0002.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Incomplete cleanup

EUVDB-ID: #VU51625

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-29623

CWE-ID: CWE-459 - Incomplete cleanup

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.0.0 - 2.31.90

WPE WebKit: 2.19.93 - 2.31.90

CPE2.3

External links

http://webkitgtk.org/security/WSA-2021-0002.html

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Use-after-free

EUVDB-ID: #VU51626

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-9947

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing web content. 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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.0.0 - 2.29.92

WPE WebKit: 2.19.93 - 2.29.91

CPE2.3

External links

http://webkitgtk.org/security/WSA-2021-0002.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Security restrictions bypass

EUVDB-ID: #VU50232

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-1765

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WPE WebKit: 2.19.93 - 2.31.90

WebKitGTK+: 2.0.0 - 2.31.90

CPE2.3

External links

http://support.apple.com/en-us/HT212147

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Type Confusion

EUVDB-ID: #VU50234

Risk: High

CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2021-1789

CWE-ID: CWE-843 - Type confusion

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WPE WebKit: 2.19.93 - 2.31.90

WebKitGTK+: 2.0.0 - 2.31.90

CPE2.3

External links

http://support.apple.com/en-us/HT212147

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

6) Information disclosure

EUVDB-ID: #VU50235

Risk: Medium

CVSSv3.1: 4.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-1799

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.0.0 - 2.31.90

WPE WebKit: 2.19.93 - 2.31.90

CPE2.3

External links

http://support.apple.com/en-us/HT212147
http://webkitgtk.org/security/WSA-2021-0002.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

7) Security restrictions bypass

EUVDB-ID: #VU50233

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-1801

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WPE WebKit: 2.19.93 - 2.31.90

WebKitGTK+: 2.0.0 - 2.31.90

CPE2.3

External links

http://support.apple.com/en-us/HT212147
http://webkitgtk.org/security/WSA-2021-0002.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

8) Business Logic Errors

EUVDB-ID: #VU50043

Risk: Critical

CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2021-1870

CWE-ID: CWE-840 - Business Logic Errors (3.0)

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WPE WebKit: 2.27.91 - 2.31.90

WebKitGTK+: 2.5.2a - 2.31.90

CPE2.3

External links

http://support.apple.com/en-us/HT212146
http://webkitgtk.org/security/WSA-2021-0002.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

Risk	Critical
Patch available	YES
Number of vulnerabilities	8
CVE-ID	CVE-2020-27918 CVE-2020-29623 CVE-2020-9947 CVE-2021-1765 CVE-2021-1789 CVE-2021-1799 CVE-2021-1801 CVE-2021-1870
CWE-ID	CWE-416 CWE-459 CWE-264 CWE-843 CWE-200 CWE-840
Exploitation vector	Network
Public exploit	Vulnerability #5 is being exploited in the wild. Vulnerability #8 is being exploited in the wild.
Vulnerable software Subscribe	WPE WebKit Server applications / Frameworks for developing and running applications WebKitGTK+ Server applications / Frameworks for developing and running applications
Vendor	WebKitGTK