GHSA-8jxm-xp43-qh3q

Source

https://github.com/advisories/GHSA-8jxm-xp43-qh3q

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/06/GHSA-8jxm-xp43-qh3q/GHSA-8jxm-xp43-qh3q.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-8jxm-xp43-qh3q

Aliases

CVE-2023-34758
CVE-2023-35170
GO-2023-1866

Published

2023-06-21T22:08:34Z

Modified

2026-07-08T06:28:02Z

Severity

8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
9.2 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

Silver vulnerable to MitM attack against implants due to a cryptography vulnerability

Details

Summary

The current cryptography implementation in Sliver up to version 1.5.39 allows a MitM with access to the corresponding implant binary to execute arbitrary codes on implanted devices via intercepted and crafted responses. (Reserved CVE ID: CVE-2023-34758)

Details

Please see the PoC repo.

PoC

Please also see the PoC repo. To setup a simple PoC environment,

Generate an implant with its C2 set to the PoC server's address and copy the embedded private implant key and public server key into the config json.
Run the implant on a separate VM and a notepad.exe window should pop up on the implanted VM.

Impact

A successful attack grants the attacker permission to execute arbitrary code on the implanted device.

References

https://github.com/BishopFox/sliver/blob/master/implant/sliver/cryptography/implant.go
https://github.com/BishopFox/sliver/blob/master/implant/sliver/cryptography/crypto.go
https://github.com/tangent65536/Slivjacker

Credits

Ting-Wei Hsieh from CHT Security Co. Ltd.

Database specific

{
    "cwe_ids":  [
        "CWE-327"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2023-06-21T22:08:34Z",
    "nvd_published_at":  "2023-06-26T20:15:10Z",
    "severity":  "CRITICAL"
}

References

Affected packages

Go / github.com/bishopfox/sliver

Package

Name: github.com/bishopfox/sliver; View open source insights on deps.dev
Purl: pkg:golang/github.com/bishopfox/sliver

Affected ranges

Type: SEMVER
Events: Introduced

1.5.0

Fixed

1.5.40

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/06/GHSA-8jxm-xp43-qh3q/GHSA-8jxm-xp43-qh3q.json"