What is the severity of CVE-2023-35838?

CVE-2023-35838 has been assessed as a high severity vulnerability due to its potential impact on network traffic and security.

How do I fix CVE-2023-35838?

To mitigate CVE-2023-35838, you should update the WireGuard client to a version that resolves this configuration issue.

What systems are affected by CVE-2023-35838?

CVE-2023-35838 specifically affects the WireGuard client version 0.5.3 on Windows systems.

What kind of attack does CVE-2023-35838 enable?

CVE-2023-35838 allows an attacker to block legitimate IP traffic to specified addresses, disrupting normal network connectivity.

Is there a workaround for CVE-2023-35838?

Currently, the best workaround for CVE-2023-35838 is to avoid using WireGuard client version 0.5.3 until the issue is patched.

Vulnerability/
CVE-2023-35838

medium

5.7

CWE

610

9/8/2023

18/10/2024

CVE-2023-35838

First published: Wed Aug 09 2023(Updated: )

The WireGuard client 0.5.3 on Windows insecurely configures the operating system and firewall such that traffic to a local network that uses non-RFC1918 IP addresses is blocked. This allows an adversary to trick the victim into blocking IP traffic to selected IP addresses and services even while the VPN is enabled. NOTE: the tunnelcrack.mathyvanhoef.com website uses this CVE ID to refer more generally to "LocalNet attack resulting in the blocking of traffic" rather than to only WireGuard.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
WireGuard	=0.5.3
Microsoft Windows Operating System

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Frequently Asked Questions

What is the severity of CVE-2023-35838?
CVE-2023-35838 has been assessed as a high severity vulnerability due to its potential impact on network traffic and security.
How do I fix CVE-2023-35838?
To mitigate CVE-2023-35838, you should update the WireGuard client to a version that resolves this configuration issue.
What systems are affected by CVE-2023-35838?
CVE-2023-35838 specifically affects the WireGuard client version 0.5.3 on Windows systems.
What kind of attack does CVE-2023-35838 enable?
CVE-2023-35838 allows an attacker to block legitimate IP traffic to specified addresses, disrupting normal network connectivity.
Is there a workaround for CVE-2023-35838?
Currently, the best workaround for CVE-2023-35838 is to avoid using WireGuard client version 0.5.3 until the issue is patched.

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collector/mitre-cve
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agent/last-modified-date
agent/source
agent/author
collector/nvd-api
agent/software-canonical-lookup-request
agent/softwarecombine
agent/tags
collector/nvd-index
vendor/wireguard
canonical/wireguard
version/wireguard/0.5.3
vendor/microsoft
canonical/microsoft windows operating system

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