// For flags

CVE-2021-1792

Apple macOS CoreText TTF Parsing Out-of-Bounds Read Information Disclosure Vulnerability

Severity Score

8.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A remote attacker may be able to cause arbitrary code execution.

Se abordó una lectura fuera de límites con una comprobación de límites mejorada. Este problema es corregido en macOS Big Sur versión 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS versión 7.3, tvOS versión 14.4, iOS versión 14.4 y iPadOS versión 14.4. Un atacante remoto puede conllevar a una ejecución de código arbitraria.

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Apple macOS. Interaction with the CoreText library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.
The specific flaw exists within the parsing of TTF fonts. Crafted data in a TTF font can trigger a read past the end of an allocated data structure. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process.

*Credits: Mickey Jin & Junzhi Lu of Trend Micro Mobile Security Research Team
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-12-08 CVE Reserved
  • 2021-02-02 CVE Published
  • 2024-08-03 CVE Updated
  • 2024-09-05 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-125: Out-of-bounds Read
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apple
Search vendor "Apple"
Ipados
Search vendor "Apple" for product "Ipados"
< 14.4
Search vendor "Apple" for product "Ipados" and version " < 14.4"
-
Affected
Apple
Search vendor "Apple"
Iphone Os
Search vendor "Apple" for product "Iphone Os"
< 14.4
Search vendor "Apple" for product "Iphone Os" and version " < 14.4"
-
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
>= 10.14 < 10.14.6
Search vendor "Apple" for product "Mac Os X" and version " >= 10.14 < 10.14.6"
-
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
>= 10.15 < 10.15.7
Search vendor "Apple" for product "Mac Os X" and version " >= 10.15 < 10.15.7"
-
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.14.6
Search vendor "Apple" for product "Mac Os X" and version "10.14.6"
-
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.14.6
Search vendor "Apple" for product "Mac Os X" and version "10.14.6"
security_update_2019-004
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.14.6
Search vendor "Apple" for product "Mac Os X" and version "10.14.6"
security_update_2019-005
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.14.6
Search vendor "Apple" for product "Mac Os X" and version "10.14.6"
security_update_2019-006
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.14.6
Search vendor "Apple" for product "Mac Os X" and version "10.14.6"
security_update_2019-007
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.14.6
Search vendor "Apple" for product "Mac Os X" and version "10.14.6"
security_update_2020-001
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.14.6
Search vendor "Apple" for product "Mac Os X" and version "10.14.6"
security_update_2020-002
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.14.6
Search vendor "Apple" for product "Mac Os X" and version "10.14.6"
security_update_2020-003
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.14.6
Search vendor "Apple" for product "Mac Os X" and version "10.14.6"
security_update_2020-004
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.14.6
Search vendor "Apple" for product "Mac Os X" and version "10.14.6"
security_update_2020-005
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.14.6
Search vendor "Apple" for product "Mac Os X" and version "10.14.6"
security_update_2020-006
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.14.6
Search vendor "Apple" for product "Mac Os X" and version "10.14.6"
security_update_2020-007
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.14.6
Search vendor "Apple" for product "Mac Os X" and version "10.14.6"
supplemental_update
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.14.6
Search vendor "Apple" for product "Mac Os X" and version "10.14.6"
supplemental_update_2
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.15.7
Search vendor "Apple" for product "Mac Os X" and version "10.15.7"
-
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.15.7
Search vendor "Apple" for product "Mac Os X" and version "10.15.7"
supplemental_update
Affected
Apple
Search vendor "Apple"
Macos
Search vendor "Apple" for product "Macos"
>= 11.0 < 11.2
Search vendor "Apple" for product "Macos" and version " >= 11.0 < 11.2"
-
Affected
Apple
Search vendor "Apple"
Tvos
Search vendor "Apple" for product "Tvos"
< 14.4
Search vendor "Apple" for product "Tvos" and version " < 14.4"
-
Affected
Apple
Search vendor "Apple"
Watchos
Search vendor "Apple" for product "Watchos"
< 7.3
Search vendor "Apple" for product "Watchos" and version " < 7.3"
-
Affected