// For flags

CVE-2021-45486

kernel: information leak in the IPv4 implementation

Severity Score

3.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

In the IPv4 implementation in the Linux kernel before 5.12.4, net/ipv4/route.c has an information leak because the hash table is very small.

En la implementación de IPv4 en el kernel de Linux versiones anteriores a 5.12.4, el archivo net/ipv4/route.c presenta un filtrado de información porque la tabla hash es muy pequeña

An information leak flaw was found in the Linux kernel’s IPv4 implementation in the ip_rt_init in net/ipv4/route.c function. The use of a small hash table in IP ID generation allows a remote attacker to reveal sensitive information.

*Credits: N/A
CVSS Scores
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Attack Vector
Adjacent
Attack Complexity
Low
Authentication
Single
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-12-25 CVE Reserved
  • 2021-12-25 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-327: Use of a Broken or Risky Cryptographic Algorithm
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
< 5.12.4
Search vendor "Linux" for product "Linux Kernel" and version " < 5.12.4"
-
Affected
Oracle
Search vendor "Oracle"
Communications Cloud Native Core Binding Support Function
Search vendor "Oracle" for product "Communications Cloud Native Core Binding Support Function"
22.1.3
Search vendor "Oracle" for product "Communications Cloud Native Core Binding Support Function" and version "22.1.3"
-
Affected
Oracle
Search vendor "Oracle"
Communications Cloud Native Core Network Exposure Function
Search vendor "Oracle" for product "Communications Cloud Native Core Network Exposure Function"
22.1.1
Search vendor "Oracle" for product "Communications Cloud Native Core Network Exposure Function" and version "22.1.1"
-
Affected
Oracle
Search vendor "Oracle"
Communications Cloud Native Core Policy
Search vendor "Oracle" for product "Communications Cloud Native Core Policy"
22.2.0
Search vendor "Oracle" for product "Communications Cloud Native Core Policy" and version "22.2.0"
-
Affected