CVE-2023-43644

Improper authentication in the SOCKS5 inbound in sing-box

Description

Sing-box is an open source proxy system. Affected versions are subject to an authentication bypass when specially crafted requests are sent to sing-box. This affects all SOCKS5 inbounds with user authentication and an attacker may be able to bypass authentication. Users are advised to update to sing-box 1.4.4 or to 1.5.0-rc.4. Users unable to update should not expose the SOCKS5 inbound to insecure environments.

Category

9.1
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.17%
Vendor Advisory github.com
Affected: SagerNet sing-box
Published at:
Updated at:

References

Link Tags
https://github.com/SagerNet/sing-box/security/advisories/GHSA-r5hm-mp3j-285g vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-43644?
CVE-2023-43644 has been scored as a critical severity vulnerability.
How to fix CVE-2023-43644?
To fix CVE-2023-43644, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-43644 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-43644 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-43644?
CVE-2023-43644 affects SagerNet sing-box.
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