VulnerabilityModified

CVE-2023-43644

Affected versions are subject to an authentication bypass when specially crafted requests are sent to sing-box.

CRITICAL 9.8EPSS 0.68%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.68%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 3.1: 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.68% probability · 50th percentile
CISA KEV: Not listed
Weakness: CWE-306
Affected: sagernet/sing-box
Source: security-advisories@github.com

References

https://github.com/SagerNet/sing-box/security/advisories/GHSA-r5hm-mp3j-285gVendor Advisory
https://github.com/SagerNet/sing-box/security/advisories/GHSA-r5hm-mp3j-285gVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.