Multiple vulnerabilities in WebKitGTK and WPE WebKit



Published: 2021-12-20
Risk High
Patch available YES
Number of vulnerabilities 6
CVE-ID CVE-2021-30818
CVE-2021-30823
CVE-2021-30884
CVE-2021-30888
CVE-2021-30889
CVE-2021-30897
CWE-ID CWE-843
CWE-300
CWE-200
CWE-119
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		WebKitGTK+
Server applications / Frameworks for developing and running applications

WPE WebKit
Server applications / Frameworks for developing and running applications

Vendor WebKitGTK

Security Bulletin

This security bulletin contains information about 6 vulnerabilities.

1) Type Confusion

EUVDB-ID: #VU58697

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-2021-30818

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 visit 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 update from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.33.1 - 2.33.90

WPE WebKit: 2.33.1 - 2.33.2

External links

http://webkitgtk.org/security/WSA-2021-0007.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) Man-in-the-Middle (MitM) attack

EUVDB-ID: #VU57739

Risk: Medium

CVSSv3.1: 5.3 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-30823

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists in WebKit. A remote attacker can bypass HSTS and perform MitM attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.33.1 - 2.33.90

WPE WebKit: 2.33.1 - 2.33.2

External links

http://webkitgtk.org/security/WSA-2021-0007.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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

3) Information disclosure

EUVDB-ID: #VU58696

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-30884

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 in the WebKit component when processing CSS files. A remote attacker can trick the victim to open a specially crafted website and obtain user's browsing history.

Mitigation

Install update from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.33.1 - 2.33.90

WPE WebKit: 2.33.1 - 2.33.2

External links

http://webkitgtk.org/security/WSA-2021-0007.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) Information disclosure

EUVDB-ID: #VU57741

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-30888

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 in WebKit. A malicious website using Content Security Policy reports may be able to leak information via redirect behavior.

Mitigation

Install update from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.33.1 - 2.33.90

WPE WebKit: 2.33.1 - 2.33.2

External links

http://webkitgtk.org/security/WSA-2021-0007.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.

5) Buffer overflow

EUVDB-ID: #VU57742

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-2021-30889

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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 in WebKit. 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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.33.1 - 2.33.90

WPE WebKit: 2.33.1 - 2.33.2

External links

http://webkitgtk.org/security/WSA-2021-0007.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.

6) Information disclosure

EUVDB-ID: #VU58677

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-30897

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 in the WebKit specification for the resource timing API. A remote attacker can exfiltrate cross-origin data, if the victim visits a specially crafted website.

Mitigation

Install update from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.33.1 - 2.33.90

WPE WebKit: 2.33.1 - 2.33.2

External links

http://webkitgtk.org/security/WSA-2021-0007.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.



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