// For flags

CVE-2021-1815

Apple Security Advisory 2021-04-26-2

Severity Score

5.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

A parsing issue in the handling of directory paths was addressed with improved path validation. This issue is fixed in macOS Big Sur 11.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5. A local user may be able to modify protected parts of the file system.

Se abordó un problema de análisis en el manejo de las rutas de los directorios con una comprobación de rutas mejorada. Este problema se corrigió en macOS Big Sur versión 11.3, iOS versión 14.5 e iPadOS versión 14.5, watchOS versión 7.4, tvOS versión 14.5. Un usuario local puede ser capaz de modificar partes protegidas del sistema de archivos

macOS Big Sur 11.3 addresses buffer overflow, bypass, code execution, cross site scripting, denial of service, double free, heap corruption, integer overflow, out of bounds read, out of bounds write, and use-after-free vulnerabilities.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-12-08 CVE Reserved
  • 2021-04-28 CVE Published
  • 2024-08-03 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
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"
 < 14.5
Search vendor "Apple" for product "Ipados" and version " < 14.5"
-
Affected
Apple
Search vendor "Apple"
 Iphone Os
Search vendor "Apple" for product "Iphone Os"
 < 14.5
Search vendor "Apple" for product "Iphone Os" and version " < 14.5"
-
Affected
Apple
Search vendor "Apple"
 Macos
Search vendor "Apple" for product "Macos"
 >= 11.0 < 11.3
Search vendor "Apple" for product "Macos" and version " >= 11.0 < 11.3"
-
Affected
Apple
Search vendor "Apple"
 Tvos
Search vendor "Apple" for product "Tvos"
 < 14.5
Search vendor "Apple" for product "Tvos" and version " < 14.5"
-
Affected
Apple
Search vendor "Apple"
 Watchos
Search vendor "Apple" for product "Watchos"
 < 7.4
Search vendor "Apple" for product "Watchos" and version " < 7.4"
-
Affected