Use-After-Free Vulnerability in Linux Kernel's Netfilter Subsystem
CVE-2023-3390

7.8HIGH

Key Information:

Vendor
Linux
Status
Linux
Vendor
CVE Published:
28 June 2023

Badges

👾 Exploit Exists🟡 Public PoC

Summary

A use-after-free vulnerability exists in the netfilter subsystem of the Linux kernel, specifically within the nf_tables_api.c file. This flaw arises due to improper error handling with NFT_MSG_NEWRULE, which allows an attacker with local user access to exploit a dangling pointer during transactions. Such exploitation can lead to unauthorized privilege escalation, potentially compromising the system's integrity. It is crucial for users to upgrade to versions beyond commit 1240eb93f0616b21c675416516ff3d74798fdc97 to mitigate the risks associated with this vulnerability.

Affected Version(s)

Linux Kernel 3.16 < 6.4

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2023-3390_PoC
Created by flygonty

References

https://git.kernel.org/pub/scm/linux/kernel/git/stable/li...
https://kernel.dance/1240eb93f0616b21c675416516ff3d74798f...
https://www.debian.org/security/2023/dsa-5448

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.