SB2021042325 - Multiple vulnerabilities in Microsoft Edge (Chromium-based)

Description

This security bulletin contains information about 5 secuirty vulnerabilities.

1) Heap-based buffer overflow (CVE-ID: CVE-2021-21222)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted HTML content in V8 browser engine. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

2) Integer overflow (CVE-ID: CVE-2021-21223)

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

The vulnerability exists due to integer overflow in V8 browser engine in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

3) Out-of-bounds write (CVE-ID: CVE-2021-21225)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input within the V8 browser engine in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.

4) Use-after-free (CVE-ID: CVE-2021-21226)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error within the navigation 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.

5) Type Confusion (CVE-ID: CVE-2021-21224)

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 browser engine 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.

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

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-21222
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-21223
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-21225
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-21226
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-21224