Auth bypass in Sagernet Sing-Box
CVE-2023-43644
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.008 (55.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.008 · change: +0.001
Affected products
- Sagernet Sing-Box — versions >= 1.5.0-beta.1, < 1.5.0-rc.4, < 1.4.5, 1.5.0
Weakness classification (CWE)
References
- github.com/SagerNet/sing-box/security/advisories/GHSA-r5hm-mp3j-285g (Vendor Advisory)
Frequently asked questions
- What is CVE-2023-43644?
- CVE-2023-43644 is a critical-severity vulnerability in Sagernet Sing-Box, classified under Missing Authentication for Critical Function. CVSS score: 9.1/10. Published 2023-09-25.
- How severe is CVE-2023-43644?
- Critical severity. CVSS v3 base score is 9.1 out of 10.