SB2021102711 - Multiple vulnerabilities in macOS Big Sur
Published: October 27, 2021 Updated: July 5, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 29 secuirty vulnerabilities.
1) Out-of-bounds read (CVE-ID: CVE-2021-30876)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in AppleScript. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.
2) 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.
3) Out-of-bounds read (CVE-ID: CVE-2021-30911)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in Model I/O subsystem. A remote attacker can create a specially crafted USD file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.
4) Out-of-bounds read (CVE-ID: CVE-2021-30910)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in Model I/O subsystem. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.
5) 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.
6) Buffer overflow (CVE-ID: CVE-2021-30821)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in the IOGraphics subsystem. A local user can run a specially crafted program to trigger memory corruption and execute arbitrary code with kernel privileges.
7) Out-of-bounds read (CVE-ID: CVE-2021-30879)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in AppleScript. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.
8) Out-of-bounds write (CVE-ID: CVE-2021-30901)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error when processing untrusted input in the Intel Graphics Driver. A local user can run a specially crafted program to trigger an out-of-bounds write and execute arbitrary code on the system with kernel privileges.
9) Buffer overflow (CVE-ID: CVE-2021-30824)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in Intel Graphics Driver. A local user can run a specially crafted program to trigger memory corruption and execute arbitrary code with kernel privileges.
10) Security restrictions bypass (CVE-ID: CVE-2021-30906)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due improper permissions checks in iCloud. A local user can bypass security restrictions bypass and escalate privileges on the system.
11) Input validation error (CVE-ID: CVE-2021-30881)
The vulnerability allows a remote attacker to execute arbitrary code on the system.
The vulnerability exists due to insufficient validation of user-supplied input in FileProvider. A remote attacker trick the victim to open a specially crafted archive and execute arbitrary code on the system.
12) 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.
13) 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.
14) Race condition (CVE-ID: CVE-2021-30899)
The vulnerability allows a local application to escalate privileges on the system.
The vulnerability exists due to a race condition in the Bluetooth subsystem. A malicious application can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
15) 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.
16) Out-of-bounds read (CVE-ID: CVE-2021-30880)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in AppleScript. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.
17) Out-of-bounds read (CVE-ID: CVE-2021-30877)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in AppleScript. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.
18) Race condition (CVE-ID: CVE-2021-30868)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition in SMB component. A malicious application can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
19) Security restrictions bypass (CVE-ID: CVE-2021-30913)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists in the SoftwareUpdate subsystem. A malicious application is able to edit the NVRAM variables and gain unauthorized access to the system.
20) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2021-30912)
The vulnerability allows a local application to escalate privileges on the system.
The vulnerability exists in SoftwareUpdate subsystem. A local user can gain access to a user's Keychain items and obtain sensitive information.
21) State Issues (CVE-ID: CVE-2021-30915)
The vulnerability allows a local application to gain access to sensitive information.
The vulnerability exists in the UIKit. An attacker with physical access to the affected system can determine characteristics of a user's password in a secure text entry field and gain unauthorized access to the system.
22) Information disclosure (CVE-ID: CVE-2021-30908)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to excessive data output in the Windows Server component. A local user can view the previous logged-in user’s desktop from the fast user switching screen.
23) Insecure Inherited Permissions (CVE-ID: CVE-2021-30892)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists in the zsh component in macOS due to incorrectly inherited permissions. A local user can modify protected parts of the file system.
24) 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.
25) Buffer overflow (CVE-ID: CVE-2021-30922)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the Intel Graphics Driver. A local user can run a specially crafted program to trigger memory corruption and execute arbitrary code with elevated privileges.
26) Input validation error (CVE-ID: CVE-2021-30833)
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to insufficient validation of user-supplied input when processing xar archives. A remote attacker can create a specially crafted .xar archive, trick the victim into opening it and overwrite arbitrary files on the system.
Successful exploitation of the vulnerability may allow an attacker to compromise the affected system.
27) 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.
28) 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.
29) Out-of-bounds read (CVE-ID: CVE-2021-30905)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within the CoreAudio subsystem. A remote attacker can create a specially crafted audio file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.
Remediation
Install update from vendor's website.