Nifi
CVE-2020-9487
HIGH
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
1DescriptionNVD
In Apache NiFi 1.0.0 to 1.11.4, the NiFi download token (one-time password) mechanism used a fixed cache size and did not authenticate a request to create a download token, only when attempting to use the token to access the content. An unauthenticated user could repeatedly request download tokens, preventing legitimate users from requesting download tokens.
AnalysisAI
In Apache NiFi 1.0.0 to 1.11.4, the NiFi download token (one-time password) mechanism used a fixed cache size and did not authenticate a request to create a download token, only when attempting to. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Technical ContextAI
This vulnerability is classified as Missing Authentication for Critical Function (CWE-306), which allows attackers to access critical functionality without authentication. In Apache NiFi 1.0.0 to 1.11.4, the NiFi download token (one-time password) mechanism used a fixed cache size and did not authenticate a request to create a download token, only when attempting to use the token to access the content. An unauthenticated user could repeatedly request download tokens, preventing legitimate users from requesting download tokens. Affected products include: Apache Nifi.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Require authentication for all sensitive operations, implement defense in depth.
The DBCPConnectionPool and HikariCPConnectionPool Controller Services in Apache NiFi 0.0.2 through 1.21.0 allow an authe
In Apache Commons Beanutils 1.9.2, a special BeanIntrospector class was added which allows suppressing the ability for a
In Apache NiFi before 0.7.2 and 1.x before 1.1.2 in a cluster environment, the proxy chain serialization/deserialization
Apache NiFi External XML Entity issue in SplitXML processor. Rated critical severity (CVSS 9.8), this vulnerability is r
A flaw was found in jackson-databind before 2.9.10.7. Rated high severity (CVSS 8.1), this vulnerability is remotely exp
Uncontrolled decompression in Apache NiFi 1.5.0 through 2.10.0 exposes the REST API to unauthenticated denial-of-service
Apache NiFi 0.0.2 through 1.22.0 include Processors and Controller Services that support HTTP URL references for retriev
The optional ShellUserGroupProvider in Apache NiFi 1.10.0 to 1.16.2 and Apache NiFi Registry 0.6.0 to 1.16.2 does not ne
When using an authentication mechanism other than PKI, when the user clicks Log Out in NiFi versions 1.0.0 to 1.9.2, NiF
Authorization bypass in Apache NiFi 1.10.0 through 2.10.0 allows read-only authenticated users to submit Parameter Conte
In Apache NiFi before 0.7.2 and 1.x before 1.1.2 in a cluster environment, if an anonymous user request is replicated to
Apache NiFi before 0.7.4 and 1.x before 1.3.0 need to establish the response header telling browsers to only allow frami
Same technique Authentication Bypass
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External POC / Exploit Code
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