Multiple vulnerabilities in WebKitGTK



Published: 2021-04-28 | Updated: 2021-06-03
Risk Critical
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2021-1817
CVE-2021-1820
CVE-2021-1826
CVE-2021-30661
CVE-2021-1825
CWE-ID CWE-119
CWE-665
CWE-79
CWE-416
Exploitation vector Network
Public exploit Vulnerability #4 is being exploited in the wild.
Vulnerable software
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WebKitGTK+
Server applications / Frameworks for developing and running applications

Vendor WebKitGTK

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

Updated: 03.06.2021

Changed bulletin status to patched.

1) Buffer overflow

EUVDB-ID: #VU52674

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-1817

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

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 web content in WebKit. A remote attacker can create a specially crafted web page, trick the victim into visiting 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 updates from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.30.0 - 2.32.0


CPE2.3 External links

http://support.apple.com/en-us/HT212325

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Improper Initialization

EUVDB-ID: #VU52673

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-1820

CWE-ID: CWE-665 - Improper Initialization

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to improper memory initialization in WebKit. A remote attacker can create a specially crafted web page, trick the victim into visiting it and disclose contents of process memory.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.30.0 - 2.32.0


CPE2.3 External links

http://support.apple.com/en-us/HT212325

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

3) Universal cross-site scripting

EUVDB-ID: #VU52672

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-1826

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data within WebKit. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.30.0 - 2.32.0


CPE2.3 External links

http://support.apple.com/en-us/HT212325

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

4) Use-after-free

EUVDB-ID: #VU52652

Risk: Critical

CVSSv3.1:

CVE-ID: CVE-2021-30661

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 the WebKit Storage component. A remote attacker can create a specially crafted web page, trick the victim into visiting 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.

Note, the vulnerability is being actively exploited in the wild.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.30.0 - 2.32.0


CPE2.3 External links

http://support.apple.com/en-us/HT212325

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

5) Universal cross-site scripting

EUVDB-ID: #VU52643

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-1825

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.30.0 - 2.32.0


CPE2.3 External links

http://support.apple.com/en-us/HT212318

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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