Multiple vulnerabilities in Microsoft Edge

Published: 2021-10-30 | Updated: 2023-01-08

Risk	Critical
Patch available	YES
Number of vulnerabilities	7
CVE-ID	CVE-2021-37997 CVE-2021-37998 CVE-2021-37999 CVE-2021-38000 CVE-2021-38001 CVE-2021-38002 CVE-2021-38003
CWE-ID	CWE-416 CWE-20 CWE-749 CWE-843 CWE-358
Exploitation vector	Network
Public exploit	Vulnerability #4 is being exploited in the wild. Public exploit code for vulnerability #5 is available. Vulnerability #7 is being exploited in the wild.
Vulnerable software Subscribe	Microsoft Edge Client/Desktop applications / Web browsers
Vendor	Microsoft

Security Bulletin

This security bulletin contains information about 7 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU57760

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-2021-37997

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 within the Sign-In component in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger use-after-free error and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Microsoft Edge: 79.0.309.71 - 95.0.1020.38

CPE2.3

External links

http://chromereleases.googleblog.com/2021/10/stable-channel-update-for-desktop_28.html
http://crbug.com/1259864
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-37997

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

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

2) Use-after-free

EUVDB-ID: #VU57761

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-2021-37998

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 within the Garbage Collection component in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger use-after-free error and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Microsoft Edge: 79.0.309.71 - 95.0.1020.38

CPE2.3

External links

http://chromereleases.googleblog.com/2021/10/stable-channel-update-for-desktop_28.html
http://crbug.com/1259587
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-37998

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

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

3) Input validation error

EUVDB-ID: #VU57762

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-37999

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to improper input validation in New Tab Page in Google Chrome. A remote attacker can trick the victim to visit a specially crafted webpage and execute arbitrary code on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Microsoft Edge: 79.0.309.71 - 95.0.1020.38

CPE2.3

External links

http://chromereleases.googleblog.com/2021/10/stable-channel-update-for-desktop_28.html
http://crbug.com/1251541
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-37999

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

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

4) Exposed dangerous method or function

EUVDB-ID: #VU57766

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-2021-38000

CWE-ID: CWE-749 - Exposed Dangerous Method or Function

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insecure implementation in V8 engine in Google Chrome. A remote attacker can create a specially crafted website, trick the victim into visiting it and execute arbitrary code on the system.

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

Mitigation

Install update from vendor's website.

Vulnerable software versions

Microsoft Edge: 79.0.309.71 - 95.0.1020.38

CPE2.3

External links

http://chromereleases.googleblog.com/2021/10/stable-channel-update-for-desktop_28.html
http://crbug.com/1263462
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38000

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

5) Type Confusion

EUVDB-ID: #VU57763

Risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2021-38001

CWE-ID: CWE-843 - Type confusion

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a type confusion error within the V8 component in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into visiting it, 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

Microsoft Edge: 79.0.309.71 - 95.0.1020.38

CPE2.3

External links

http://chromereleases.googleblog.com/2021/10/stable-channel-update-for-desktop_28.html
http://crbug.com/1260577
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38001

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

6) Use-after-free

EUVDB-ID: #VU57764

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-2021-38002

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 within the Web Transport component in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger use-after-free error and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Microsoft Edge: 79.0.309.71 - 95.0.1020.38

CPE2.3

External links

http://chromereleases.googleblog.com/2021/10/stable-channel-update-for-desktop_28.html
http://crbug.com/1260940
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38002

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

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

7) Improperly implemented security check for standard

EUVDB-ID: #VU57765

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-2021-38003

CWE-ID: CWE-358 - Improperly Implemented Security Check for Standard

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to incorrect implementation in the V8 engine in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into visiting it and compromise the system.

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

Mitigation

Install update from vendor's website.

Vulnerable software versions

Microsoft Edge: 79.0.309.71 - 95.0.1020.38

CPE2.3

External links

http://chromereleases.googleblog.com/2021/10/stable-channel-update-for-desktop_28.html
http://crbug.com/1263462
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38003

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.