SB2021102716 - Multiple vulnerabilities in Apple iOS 14 and iPadOS 14

Description

This security bulletin contains information about 11 secuirty vulnerabilities.

1) Integer overflow (CVE-ID: CVE-2021-30907)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer overflow in the Audio component. A malicious application can trigger integer overflow and execute arbitrary code with elevated privileges.

2) Buffer overflow (CVE-ID: CVE-2021-30917)

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

The vulnerability exists due to a boundary error when processing ICC profiles in ColorSync subsystem. A remote attacker can create a specially crafted image, 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.

3) Input validation error (CVE-ID: CVE-2021-30903)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to insufficient validation of user-supplied input in Continuity Camera component. A local user can pass specially crafted input to the application and escalate privileges on the system.

4) Out-of-bounds write (CVE-ID: CVE-2021-30919)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error within the CoreGraphics subsystem when processing PDF files. A remote attacker can create a specially crafted PDF file, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.

5) Out-of-bounds write (CVE-ID: CVE-2021-30900)

The vulnerability allows a malicious application to escalate privileges on the system.

The vulnerability exists due to a boundary error in GPU Drivers. A malicious application can trigger an out-of-bounds write and execute arbitrary code with kernel privileges.

6) Integer overflow (CVE-ID: CVE-2021-30883)

The vulnerability allows a malicious application to escalate privileges on the system.

The vulnerability exists due to a boundary error within the IOMobileFrameBuffer subsystem. A malicious application can trigger integer overflow and execute arbitrary code on with kernel privileges.

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

7) Buffer overflow (CVE-ID: CVE-2021-30909)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error within the macOS kernel subsystem. A local user can run a specially crafted program to trigger memory corruption and execute arbitrary code with kernel privileges.

8) Buffer overflow (CVE-ID: CVE-2021-30916)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error within the macOS kernel subsystem. A local user can run a specially crafted program to trigger memory corruption and execute arbitrary code with kernel privileges.

9) State Issues (CVE-ID: CVE-2021-30918)

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists in the Status Bar component. A local attacker can view restricted content from the lockscreen.

10) Use-after-free (CVE-ID: CVE-2021-30902)

The vulnerability allows a local attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in the Voice Control subsystem. A local attacker with physical access to device can trigger a use-after-free error and compromise the affected device.

11) Information disclosure (CVE-ID: CVE-2021-30888)

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.

Remediation

Install update from vendor's website.

References

• https://support.apple.com/en-us/HT212868
• https://blog.google/threat-analysis-group/spyware-vendors-use-0-days-and-n-days-against-popular-platforms/