---
title: "Security digest: October 4, 2023"
url: https://erroneo.us/security/2023-10-04/
description: "October 4, 2023 vulnerability digest: 2 CISA KEV additions (JetBrains, Microsoft). What to patch and who can relax."
type: security-digest-day
section: "Security Digest"
date_published: 2023-10-04
date_modified: 2023-10-04
publisher: erroneo.us
author: erroneo.us Security Desk
license: All rights reserved. Quote with attribution and a link.
---

# Security digest: October 4, 2023

2 known exploited (cisa kev) additions.

## Take stock

- Do you run any of these? JetBrains TeamCity, Microsoft Windows CNG Key Isolation Service. They are being exploited in the wild (CISA KEV). Patch or mitigate if you do; CISA’s federal deadline is 2023-10-25.
- None of it touches your stack? Then there is nothing to do today. That is a result, not a failure to read carefully.

## Known exploited (CISA KEV)

- [CVE-2023-42793](https://erroneo.us/security/cve/CVE-2023-42793/index.md) JetBrains TeamCity: JetBrains TeamCity Authentication Bypass Vulnerability (CISA due 2023-10-25)
- [CVE-2023-28229](https://erroneo.us/security/cve/CVE-2023-28229/index.md) Microsoft Windows CNG Key Isolation Service: Microsoft Windows CNG Key Isolation Service Privilege Escalation Vulnerability (CISA due 2023-10-25)

## Critical advisories

None.

---
Source page: https://erroneo.us/security/2023-10-04/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt