Known exploited vulnerability
CVE-2023-42793
The short answer
CVE-2023-42793 affects JetBrains TeamCity and is rated critical (CVSS 9.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2023-10-04: attackers are using it, so patch it first.
What it is
Severity
9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Oct 4, 2023
Federal due date Oct 25, 2023
EPSS, next 30 days
100%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected products
TeamCity. NVD's record lists the exact affected versions.
References
- attackerkb.com/topics/1XEEEkGHzt/cve-2023-42793 Third Party Advisory
- blog.jetbrains.com/teamcity/2023/09/cve-2023-42793-vulnerability-post-mortem/ Vendor Advisory
- www.jetbrains.com/privacy-security/issues-fixed/ Vendor Advisory
- www.rapid7.com/blog/post/2023/09/25/etr-cve-2023-42793-critical-authentication-bypass-in-jetbrains-teamcity-ci-cd-servers/ Broken LinkThird Party Advisory
- www.securityweek.com/recently-patched-teamcity-vulnerability-exploited-to-hack-servers/ Press/Media Coverage
- www.sonarsource.com/blog/teamcity-vulnerability/ ExploitThird Party Advisory
- attackerkb.com/topics/1XEEEkGHzt/cve-2023-42793 Third Party Advisory
- blog.jetbrains.com/teamcity/2023/09/cve-2023-42793-vulnerability-post-mortem/ Vendor Advisory
- www.jetbrains.com/privacy-security/issues-fixed/ Vendor Advisory
- www.rapid7.com/blog/post/2023/09/25/etr-cve-2023-42793-critical-authentication-bypass-in-jetbrains-teamcity-ci-cd-servers/ Broken LinkThird Party Advisory
- www.securityweek.com/recently-patched-teamcity-vulnerability-exploited-to-hack-servers/ Press/Media Coverage
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-42793 US Government Resource
Questions
Is CVE-2023-42793 being exploited?
Yes. CISA added CVE-2023-42793 to its Known Exploited Vulnerabilities catalog on 2023-10-04, with a federal remediation due date of 2023-10-25. CISA lists it as used in ransomware campaigns.
How do I fix CVE-2023-42793?
CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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