CVE-2023-43644

high-risk
Published 2023-09-25

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.

Do I need to act?

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0.17% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.1/10 Critical
NETWORK / LOW complexity

Affected Products (16)

Sing-Box
Sing-Box
Sing-Box
Sing-Box
Sing-Box
Sing-Box
Sing-Box
Sing-Box
Sing-Box
Sing-Box
Sing-Box
Sing-Box
Sing-Box
Sing-Box
Sing-Box
Sing-Box

Affected Vendors

50
/ 100
high-risk
Severity 31/34 · Critical
Exploitability 1/34 · Minimal
Exposure 18/34 · Moderate