cve.bz

CVE-2023-43644

9.8 criticalEPSS 0.8%

Critical (9.8) in sagernet sing-box. EPSS 0.8% chance of exploitation in the next 30 days. Fixed in github.com/sagernet/sing-box 1.4.5, 1.5.0-rc.5.

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.

Severity

CVSS 3.1

9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
0.8% chance of exploitation in the next 30 days; higher than 57% of CVEs (scores of 2026-10-31)
CWE
CWE-306
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-r5hm-mp3j-285gGogithub.com/sagernet/sing-box<1.4.51.4.5
GHSA-r5hm-mp3j-285gGogithub.com/sagernet/sing-box>=1.5.0-beta.1 <1.5.0-rc.51.5.0-rc.5
GHSA-r5hm-mp3j-285gGogithub.com/sagernet/sing<0.2.12-0.20230925092853-5b05b5c147d90.2.12-0.20230925092853-5b05b5c147d9
GO-2023-2077Gogithub.com/sagernet/sing<0.2.12-0.20230925092853-5b05b5c147d90.2.12-0.20230925092853-5b05b5c147d9

References

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