Auth bypass in Apache Nifi
CVE-2018-17195
The template upload API endpoint accepted requests from different domain when sent in conjunction with ARP spoofing + man in the middle (MiTM) attack, resulting in a CSRF attack. The required attack vector is complex, requiring a scenario with client certificate authentication, same subnet access, and injecting malicious code into an unprotected (plaintext HTTP) website which the targeted user later visits, but the possible damage warranted a Severe severity level. Mitigation: The fix to apply Cross-Origin Resource Sharing (CORS) policy request filtering was applied on the Apache NiFi 1.8.0 release. Users running a prior 1.x release should upgrade to the appropriate release.
EPSS: 0.007 (51.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Apache Nifi
- Apache Software Foundation Nifi — versions Apache NiFi 1.0.0 - 1.7.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@apache.org (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-17195?
- CVE-2018-17195 is a high-severity vulnerability in Apache Nifi, classified under Cleartext Transmission of Sensitive Information. CVSS score: 7.5/10. Published 2018-12-19.
- How severe is CVE-2018-17195?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2018-17195 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.