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TI-2023-23370 Aliases CVE-2023-43644GHSA-r5hm-mp3j-285g

Improper authentication in the SOCKS5 inbound in sing-box

Priority MEDIUM 50CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-306.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00823 57th percentileScored 2026-11-07
Fix Fixed sing-box (SagerNet): 1.4.5, 1.5.0-rc.4github.com/sagernet/sing-box (Go): 1.4.5, 1.5.0-rc.5+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SagerNetsing-boxbefore 1.4.5; 1.5.0-beta.1 to before 1.5.0-rc.41.4.5, 1.5.0-rc.4Patch availableCNA
—github.com/sagernet/sing-box (Go)before 1.4.51.4.5Patch availableGHSA-r5hm-mp3j-285g
—github.com/sagernet/sing-box (Go)1.5.0-beta.1 to before 1.5.0-rc.51.5.0-rc.5Patch availableGHSA-r5hm-mp3j-285g
—github.com/sagernet/sing (Go)before 0.2.12-0.20230925092853-5b05b5c147d90.2.12-0.20230925092853-5b05b5c147d9Patch availableGHSA-r5hm-mp3j-285g
  • sing-box VendorSagerNet Affected before 1.4.5; 1.5.0-beta.1 to before 1.5.0-rc.4 Fixed in 1.4.5, 1.5.0-rc.4 Patch available CNA
  • github.com/sagernet/sing-box (Go) Vendor— Affected before 1.4.5 Fixed in 1.4.5 Patch available GHSA-r5hm-mp3j-285g
  • github.com/sagernet/sing-box (Go) Vendor— Affected 1.5.0-beta.1 to before 1.5.0-rc.5 Fixed in 1.5.0-rc.5 Patch available GHSA-r5hm-mp3j-285g
  • github.com/sagernet/sing (Go) Vendor— Affected before 0.2.12-0.20230925092853-5b05b5c147d9 Fixed in 0.2.12-0.20230925092853-5b05b5c147d9 Patch available GHSA-r5hm-mp3j-285g

CPE configurations NVD · 16

CPEVersionsRoleVendor
cpe:2.3:a:sagernet:sing-box:*:*:*:*:*:*:*:*before 1.4.5VulnerableSagerNet
cpe:2.3:a:sagernet:sing-box:1.5.0:beta1:*:*:*:*:*:*1.5.0 beta1VulnerableSagerNet
cpe:2.3:a:sagernet:sing-box:1.5.0:beta10:*:*:*:*:*:*1.5.0 beta10VulnerableSagerNet
cpe:2.3:a:sagernet:sing-box:1.5.0:beta11:*:*:*:*:*:*1.5.0 beta11VulnerableSagerNet
cpe:2.3:a:sagernet:sing-box:1.5.0:beta12:*:*:*:*:*:*1.5.0 beta12VulnerableSagerNet
cpe:2.3:a:sagernet:sing-box:1.5.0:beta2:*:*:*:*:*:*1.5.0 beta2VulnerableSagerNet
cpe:2.3:a:sagernet:sing-box:1.5.0:beta3:*:*:*:*:*:*1.5.0 beta3VulnerableSagerNet
cpe:2.3:a:sagernet:sing-box:1.5.0:beta4:*:*:*:*:*:*1.5.0 beta4VulnerableSagerNet
cpe:2.3:a:sagernet:sing-box:1.5.0:beta5:*:*:*:*:*:*1.5.0 beta5VulnerableSagerNet
cpe:2.3:a:sagernet:sing-box:1.5.0:beta6:*:*:*:*:*:*1.5.0 beta6VulnerableSagerNet
  • cpe:2.3:a:sagernet:sing-box:*:*:*:*:*:*:*:* Versions before 1.4.5 Vulnerable ·SagerNet
  • cpe:2.3:a:sagernet:sing-box:1.5.0:beta1:*:*:*:*:*:* Versions 1.5.0 beta1 Vulnerable ·SagerNet
  • cpe:2.3:a:sagernet:sing-box:1.5.0:beta10:*:*:*:*:*:* Versions 1.5.0 beta10 Vulnerable ·SagerNet
  • cpe:2.3:a:sagernet:sing-box:1.5.0:beta11:*:*:*:*:*:* Versions 1.5.0 beta11 Vulnerable ·SagerNet
  • cpe:2.3:a:sagernet:sing-box:1.5.0:beta12:*:*:*:*:*:* Versions 1.5.0 beta12 Vulnerable ·SagerNet
  • cpe:2.3:a:sagernet:sing-box:1.5.0:beta2:*:*:*:*:*:* Versions 1.5.0 beta2 Vulnerable ·SagerNet
  • cpe:2.3:a:sagernet:sing-box:1.5.0:beta3:*:*:*:*:*:* Versions 1.5.0 beta3 Vulnerable ·SagerNet
  • cpe:2.3:a:sagernet:sing-box:1.5.0:beta4:*:*:*:*:*:* Versions 1.5.0 beta4 Vulnerable ·SagerNet
  • cpe:2.3:a:sagernet:sing-box:1.5.0:beta5:*:*:*:*:*:* Versions 1.5.0 beta5 Vulnerable ·SagerNet
  • cpe:2.3:a:sagernet:sing-box:1.5.0:beta6:*:*:*:*:*:* Versions 1.5.0 beta6 Vulnerable ·SagerNet
Show 6 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:sagernet:sing-box:1.5.0:beta7:*:*:*:*:*:*1.5.0 beta7VulnerableSagerNet
cpe:2.3:a:sagernet:sing-box:1.5.0:beta8:*:*:*:*:*:*1.5.0 beta8VulnerableSagerNet
cpe:2.3:a:sagernet:sing-box:1.5.0:beta9:*:*:*:*:*:*1.5.0 beta9VulnerableSagerNet
cpe:2.3:a:sagernet:sing-box:1.5.0:rc1:*:*:*:*:*:*1.5.0 rc1VulnerableSagerNet
cpe:2.3:a:sagernet:sing-box:1.5.0:rc2:*:*:*:*:*:*1.5.0 rc2VulnerableSagerNet
cpe:2.3:a:sagernet:sing-box:1.5.0:rc3:*:*:*:*:*:*1.5.0 rc3VulnerableSagerNet
  • cpe:2.3:a:sagernet:sing-box:1.5.0:beta7:*:*:*:*:*:* Versions 1.5.0 beta7 Vulnerable ·SagerNet
  • cpe:2.3:a:sagernet:sing-box:1.5.0:beta8:*:*:*:*:*:* Versions 1.5.0 beta8 Vulnerable ·SagerNet
  • cpe:2.3:a:sagernet:sing-box:1.5.0:beta9:*:*:*:*:*:* Versions 1.5.0 beta9 Vulnerable ·SagerNet
  • cpe:2.3:a:sagernet:sing-box:1.5.0:rc1:*:*:*:*:*:* Versions 1.5.0 rc1 Vulnerable ·SagerNet
  • cpe:2.3:a:sagernet:sing-box:1.5.0:rc2:*:*:*:*:*:* Versions 1.5.0 rc2 Vulnerable ·SagerNet
  • cpe:2.3:a:sagernet:sing-box:1.5.0:rc3:*:*:*:*:*:* Versions 1.5.0 rc3 Vulnerable ·SagerNet

Remediation

  • Fix · CNA sing-box (SagerNet) Fixed in 1.4.5, 1.5.0-rc.4
  • Fix · GHSA-r5hm-mp3j-285g github.com/sagernet/sing-box (Go) Fixed in 1.4.5 Advisory →
  • Fix · GHSA-r5hm-mp3j-285g github.com/sagernet/sing-box (Go) Fixed in 1.5.0-rc.5 Advisory →
  • Fix · GHSA-r5hm-mp3j-285g github.com/sagernet/sing (Go) Fixed in 0.2.12-0.20230925092853-5b05b5c147d9 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-43644
  2. 2026-10-03 Alias added: GHSA-r5hm-mp3j-285g

References

Advisory 2

Other 4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences