// For flags

CVE-2021-27419

uClibc-ng Integer Overflow or Wraparound

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

uClibc-ng versions prior to 1.0.37 are vulnerable to integer wrap-around in functions malloc-simple. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.

uClibc-ng versiones anteriores a1.0.37, son vulnerables a una envoltura de enteros en las funciones malloc-simple. Esta asignación de memoria inapropiada puede conllevar a una asignación de memoria arbitraria, resultando en un comportamiento no esperado como un bloqueo o una inyección/ejecución de código remoto

*Credits: David Atch, Omri Ben Bassat, and Tamir Ariel from Microsoft Section 52, and the Azure Defender for IoT research group reported these vulnerabilities to CISA.
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-02-19 CVE Reserved
  • 2022-05-03 CVE Published
  • 2024-08-03 CVE Updated
  • 2025-01-16 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-190: Integer Overflow or Wraparound
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Uclibc-ng Project
Search vendor "Uclibc-ng Project"
 Uclibc-ng
Search vendor "Uclibc-ng Project" for product "Uclibc-ng"
 < 1.0.37
Search vendor "Uclibc-ng Project" for product "Uclibc-ng" and version " < 1.0.37"
-
Affected