CVE-2023-34758 — Sliver from v1

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.

01What is this vulnerability?

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.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-08-28T00:00:00.000Z
• Last modified: 2024-10-02T16:29:43.246Z

09References

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