CVE-2023-3090 : What You Need to Know

This CVE record was published by Google on June 28, 2023, highlighting a serious vulnerability in the Linux Kernel's ipvlan network driver. The vulnerability is identified as an out-of-bounds write issue that can be exploited to achieve local privilege escalation.

Understanding CVE-2023-3090

This section provides insights into what CVE-2023-3090 entails, the impact it carries, technical details, as well as mitigation and prevention strategies.

What is CVE-2023-3090?

CVE-2023-3090 is a heap out-of-bounds write vulnerability found in the Linux Kernel's ipvlan network driver. This vulnerability can be leveraged by attackers to escalate their privileges locally. The vulnerability stems from a lack of initialization of skb->cb in the ipvlan network driver, with CONFIG_IPVLAN enabled.

The Impact of CVE-2023-3090

The impact of this vulnerability is classified as high, with a CVSS base score of 7.8. It falls under CAPEC-233 - Privilege Escalation, signifying the severity of the issue and the potential consequences of exploitation.

Technical Details of CVE-2023-3090

The technical details encompass the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability arises due to a heap out-of-bounds write in the Linux Kernel's ipvlan network driver. The specific issue is the missing initialization of skb->cb in the driver, allowing attackers to exploit it for local privilege escalation.

Affected Systems and Versions

The vulnerability affects systems running Kernel version 3.19 with a version less than 6.4 and CONFIG_IPVLAN enabled. Users within this scope are vulnerable to exploitation and should take immediate action.

Exploitation Mechanism

Attackers can exploit this vulnerability to carry out local privilege escalation, gaining unauthorized access and potentially executing arbitrary code on the affected systems.

Mitigation and Prevention

In response to CVE-2023-3090, it is crucial to implement immediate steps for containment and then establish long-term security practices to prevent similar issues in the future.

Immediate Steps to Take

Users are advised to upgrade their systems past commit 90cbed5247439a966b645b34eb0a2e037836ea8e to mitigate the vulnerability. Patching and updating systems are critical to safeguard against potential exploitation.

Long-Term Security Practices

To enhance overall security posture, practicing good cyber hygiene, adhering to security best practices, and staying updated with patches and security advisories are essential to mitigate the risk of future vulnerabilities.