What’s Vulnerable › Vulnerabilities

CVE-2023-34758

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-08-28 · updated 2026-06-17
• Weakness: CWE-327

Description

Sliver from v1.5.x to v1.5.39 has an improper cryptographic implementation, which allows attackers to execute a man-in-the-middle attack via intercepted and crafted responses.

Affected products

• BishopFox sliver: from 1.5.0 before 1.5.40 — fixed in 1.5.40

How to fix

Upgrade to a fixed version: BishopFox sliver 1.5.40. Check the vendor advisory for mitigations.

References

• https://github.com/BishopFox/sliver/releases/tag/v1.5.40
• https://github.com/advisories/GHSA-8jxm-xp43-qh3q
• https://github.com/tangent65536/Slivjacker
• https://www.chtsecurity.com/news/04f41dcc-1851-463c-93bc-551323ad8091
• https://github.com/BishopFox/sliver/releases/tag/v1.5.40
• https://github.com/advisories/GHSA-8jxm-xp43-qh3q
• https://github.com/tangent65536/Slivjacker
• https://www.chtsecurity.com/news/04f41dcc-1851-463c-93bc-551323ad8091

Get alerted when CVE-2023-34758 or the next vulnerability affects your stack