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CVE-2021-45486

Good to know:

Date: December 24, 2021

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.

Language: C

Severity Score

3.5

Related Resources (9)

Url: https://arxiv.org/pdf/2112.09604.pdf

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2021-45486

Url: https://nvd.nist.gov/vuln/detail/CVE-2021-45486

Url: https://access.redhat.com/security/cve/CVE-2021-45486

Url: https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4

Url: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/net/ipv4/route.c?id=aa6dd211e4b1dde9d5dc25d699d35f789ae7eeba

Url: https://www.oracle.com/security-alerts/cpujul2022.html

Url: https://security-tracker.debian.org/tracker/CVE-2021-45486

Url: https://www.mend.io/vulnerability-database/CVE-2021-45486

Severity Score

3.5

Weakness Type (CWE)

Use of a Broken or Risky Cryptographic Algorithm

CWE-327

Top Fix

Upgrade Version

Upgrade to version v4.4.274, v4.9.274, v4.14.238, v4.19.196, v5.4.119, v5.10.37, v5.11.21, v5.12.4, , v5.13.3,

CVSS v3.1

Base Score:	3.5
Attack Vector (AV):	ADJACENT_NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	LOW
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	LOW
Integrity (I):	NONE
Availability (A):	NONE

CVSS v2

Base Score:	2.7
Access Vector (AV):	ADJACENT
Access Complexity (AC):	LOW
Authentication (AU):	SINGLE
Confidentiality (C):	PARTIAL
Integrity (I):	NONE
Availability (A):	NONE
Additional information:

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