SB2021072214 - Multiple vulnerabilities in Apple macOS Big Sur
Published: July 22, 2021 Updated: February 13, 2023
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 43 secuirty vulnerabilities.
1) Buffer overflow (CVE-ID: CVE-2021-30805)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within AMD kernel subsystem. A local user can run a specially crafted application to trigger buffer overflow and execute arbitrary code on the system with root privileges.
2) Out-of-bounds write (CVE-ID: CVE-2021-30792)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input in Model I/O. A remote attacker can create a specially crafted ABC file, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.
3) Out-of-bounds write (CVE-ID: CVE-2021-30766)
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 an out-of-bounds write and cause unexpected system termination or write kernel memory.
4) Out-of-bounds write (CVE-ID: CVE-2021-30765)
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 an out-of-bounds write and cause unexpected system termination or write kernel memory.
5) Input validation error (CVE-ID: CVE-2021-30784)
The vulnerability allows a local application to escalate privileges on the system.
The vulnerability exists due to insufficient validation of user-supplied input within IOKit. A local application can execute arbitrary code with root privileges.
6) Security restrictions bypass (CVE-ID: CVE-2021-30793)
The vulnerability allows a local application to escalate privileges on the system.
The vulnerability exists due to logic error within the OS Kernel subsystem. A local application can execute arbitrary code with kernel privileges.
7) Security restrictions bypass (CVE-ID: CVE-2021-30778)
The vulnerability allows a local application to bypass implemented security restrictions.
The vulnerability exists due to unspecified error in Kext Management. A local application can bypass Privacy preferences and gain access to sensitive information.
8) Input validation error (CVE-ID: CVE-2021-30796)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input within the Model I/O subsystem. A remote attacker can trick the victim to open a specially crafted USD image and perform a denial of service (DoS) attack.
9) Out-of-bounds read (CVE-ID: CVE-2021-30791)
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. A remote attacker can create a specially crafted ABC file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.
10) Buffer overflow (CVE-ID: CVE-2021-30785)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing image files in ImageIO. A remote attacker can create a specially crafted PICT file, 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.
11) Security restrictions bypass (CVE-ID: CVE-2021-30782)
The vulnerability allows a local application to bypass implemented security restrictions
The vulnerability exists due to improperly imposed security restrictions in Sandbox component. A local application cab access restricted files.
12) Race condition (CVE-ID: CVE-2021-30798)
The vulnerability allows a local user to bypass implemented security restrictions.
The vulnerability exists due to a race condition. A local user can bypass certain Privacy preferences.
13) Type Confusion (CVE-ID: CVE-2021-30758)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a type confusion error in WebKit. A remote attacker can trick the victim to open a specially crafted website, 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.
14) Use-after-free (CVE-ID: CVE-2021-30795)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when processing HTML content in WebKit. A remote attacker can create a specially crafted website, 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.
15) Input validation error (CVE-ID: CVE-2021-30797)
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to insufficient validation of user-supplied input in WebKit. A remote attacker can trick the victim to visit a specially crafted website and execute arbitrary code on the system.
16) Buffer overflow (CVE-ID: CVE-2021-30799)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTML content in WebKit. A remote attacker can create a specially crafted website, 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.
17) Out-of-bounds write (CVE-ID: CVE-2021-30787)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in Intel Graphics Driver in process_token_BindQueryStoreRegisterToMemoryList within the AppleIntelKBLGraphics kext. A local user can run a specially crafted program to trigger an out-of-bounds write and cause unexpected system termination or write kernel memory.
18) Buffer overflow (CVE-ID: CVE-2021-30779)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing image files in ImageIO. 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.
19) Out-of-bounds read (CVE-ID: CVE-2021-30790)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within AppKit component. A remote attacker can create a specially crafted JPG or PDF file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.
Successful vulnerability exploitation may lead to remote code execution.
20) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2021-30783)
The vulnerability allows a local application to bypass sandbox restrictions.
The vulnerability exists due to improperly imposed security restrictions within the CoreServices subsystem. A sandboxed process may be able to circumvent sandbox restrictions.
21) Input validation error (CVE-ID: CVE-2021-30781)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to insufficient validation of user-supplied input within the Audio subsystem. A local user can execute arbitrary code with elevated privileges.
22) Buffer overflow (CVE-ID: CVE-2021-30748)
The vulnerability allows a local application to escalate privileges on the system.
The vulnerability exists due to a boundary error within the AVEVideoEncoder subsystem. A local user can run a specially crafted program to trigger memory corruption and execute arbitrary code with kernel privileges.
23) Buffer overflow (CVE-ID: CVE-2021-30775)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing audio files within the CoreAudio subsystem. A remote attacker can create a specially crafted audio file, 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.
24) Input validation error (CVE-ID: CVE-2021-30776)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input within the CoreAudio subsystem. A remote attacker can pass specially crafted audio file to the application and perform a denial of service (DoS) attack.
25) Race condition (CVE-ID: CVE-2021-30786)
The vulnerability allows a remote attacker to execute arbitrary code on the system.
The vulnerability exists due to a race condition when processing PDF files within the CoreServices subsystem. A remote attacker can create a specially crafted PDF file to trigger the race condition and execute arbitrary code on the system.
26) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2021-30772)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to application does not properly impose security restrictions within the CoreServices subsystem. A local user can execute arbitrary code with root privileges.
27) Code Injection (CVE-ID: CVE-2021-30777)
The vulnerability allows a local application to escalate privileges on the system.
The vulnerability exists due to improper input validation within the CoreStorage subsystem. A local application can inject and execute arbitrary code with root privileges.
28) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2021-30803)
The vulnerability allows a malicious application to bypass implemented security restrictions.
The vulnerability exists due to Identity Services does not properly impose security restrictions on recent Contacts. A malicious application can gain unauthorized access to user’s recent Contacts.
29) Out-of-bounds read (CVE-ID: CVE-2021-30789)
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to a boundary condition within the CoreText component. A remote attacker can create a specially crafted font file, trick the victim into opening it, trigger out-of-bounds read error and execute arbitrary code on the system.
30) Input validation error (CVE-ID: CVE-2021-30774)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to insufficient validation of user-supplied input within Crash Reporter. A local user can execute arbitrary code with root privileges.
31) Out-of-bounds write (CVE-ID: CVE-2021-30780)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within CVMS subsystem. A local user can trigger out-of-bounds write and execute arbitrary code with root privileges.
32) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2021-30768)
The vulnerability allows a local application to bypass sandbox restrictions.
The vulnerability exists due to improperly imposed security restrictions within the dyld component. A sandboxed process may be able to circumvent sandbox restrictions.
33) Integer overflow (CVE-ID: CVE-2021-30760)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow in FontParser. A remote attacker can pass specially crafted font file, trigger integer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
34) Out-of-bounds read (CVE-ID: CVE-2021-30788)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in FontParser component. A remote attacker can create a specially crafted TTF font file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.
35) Stack-based buffer overflow (CVE-ID: CVE-2021-30759)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing font files in FontParser in libType1Scaler library. A remote unauthenticated attacker can trick the victim to open a specially crafted PFB font file, trigger stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
36) Use-after-free (CVE-ID: CVE-2021-3518)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in libxml2. A remote attacker can use a specially crafted file and execute arbitrary code on the target system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
37) State Issues (CVE-ID: CVE-2021-1821)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a logic issue within the Networking component. A remote attacker can trick the victim to visit a specially crafted webpage and perform a system denial of service.
38) Security features bypass (CVE-ID: CVE-2021-30677)
The vulnerability allows a local application to bypass implemented security restrictions.
The vulnerability exists due to a logic issue in LaunchServices. A local application can break out of its sandbox.
39) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2021-30817)
The vulnerability allows a malicious application to gain access to sensitive information.
The vulnerability exists due to improper access restrictions within the Family Sharing feature. A malicious application can access data about the accounts used by Family Sharing.
40) Improper access control (CVE-ID: CVE-2021-30871)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to improper access restrictions within the Analytics feature. A local user can bypass implemented security restrictions and access analytics data.
41) Improper access control (CVE-ID: CVE-2021-30804)
The vulnerability allows a local application to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions. A local application can bypass implemented security restrictions and gain unauthorized access to Find My data.
42) Race condition (CVE-ID: CVE-2021-31004)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition within Security feature. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
43) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2021-31006)
The vulnerability allows a local application to bypass implemented security restrictions.
The vulnerability exists due to an error in App Store. A local application can bypass certain Privacy preferences.
Remediation
Install update from vendor's website.
References
- https://support.apple.com/en-us/HT212602
- https://www.zerodayinitiative.com/advisories/ZDI-21-947/
- https://www.zerodayinitiative.com/advisories/ZDI-21-948/
- https://www.zerodayinitiative.com/advisories/ZDI-21-946/
- https://www.zerodayinitiative.com/advisories/ZDI-22-353/
- https://www.zerodayinitiative.com/advisories/ZDI-21-944/
- https://www.zerodayinitiative.com/advisories/ZDI-21-949/
- https://www.zerodayinitiative.com/advisories/ZDI-21-950/
- https://www.zerodayinitiative.com/advisories/ZDI-21-945/
- https://www.zerodayinitiative.com/advisories/ZDI-21-941/