CVE-2023-43644 json
Improper authentication in the SOCKS5 inbound in sing-box
published 2023-09-25 3 y ago modified 2026-09-10 1 mo ago also GHSA-r5hm-mp3j-285g , GO-2023-2077 , EUVD-2023-2582
- cvss
- 9.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 57%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/sagernet/sing-box 1.4.5, 1.5.0-rc.5
- go github.com/sagernet/sing 0.2.12-0.20230925092853-5b05b5c147d9
- SagerNet sing-box 1.5.0-rc.5
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.82% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/sagernet/sing-box | <1.4.5 >=1.5.0-beta.1, <1.5.0-rc.5 |
1.4.5 1.5.0-rc.5 |
| go | github.com/sagernet/sing | <0.2.12-0.20230925092853-5b05b5c147d9 |
0.2.12-0.20230925092853-5b05b5c147d9 |
Affected products
- SagerNet sing-box
Classification
- Weakness
-
- CWE-306 Missing Authentication for Critical Functionality
References
-
github.com
/SagerNet/sing-box/commit/9891fd672f5da9f20f59a1693271a946727f49e2
web
-
github.com
/SagerNet/sing/commit/5b05b5c147d9650e8accb4441e216c72a61f4859
web, patch
-
github.com
/SagerNet/sing-box/security/advisories/GHSA-r5hm-mp3j-285g
web, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2023-43644
advisory
-
github.com
/SagerNet/sing-box
package
-
github.com
/SagerNet/sing-box/releases/tag/v1.4.5
web
Sources
- CVE List CVE-2023-43644
- GitHub Advisory GHSA-r5hm-mp3j-285g
- NVD CVE-2023-43644
- OSV GO-2023-2077
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.