Vulnerability Details : CVE-2021-44521
When running Apache Cassandra with the following configuration: enable_user_defined_functions: true enable_scripted_user_defined_functions: true enable_user_defined_functions_threads: false it is possible for an attacker to execute arbitrary code on the host. The attacker would need to have enough permissions to create user defined functions in the cluster to be able to exploit this. Note that this configuration is documented as unsafe, and will continue to be considered unsafe after this CVE.
Vulnerability category: Execute code
Exploit prediction scoring system (EPSS) score for CVE-2021-44521
Probability of exploitation activity in the next 30 days: 2.13%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 88 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-44521
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|
|
8.5
|
HIGH | AV:N/AC:M/Au:S/C:C/I:C/A:C |
6.8
|
10.0
|
[email protected] |
|
9.1
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
2.3
|
6.0
|
[email protected] |
CWE ids for CVE-2021-44521
-
The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.Assigned by: [email protected] (Secondary)
-
The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.Assigned by: [email protected] (Primary)
References for CVE-2021-44521
-
http://www.openwall.com/lists/oss-security/2022/02/11/4
Mailing List;Third Party Advisory
-
https://security.netapp.com/advisory/ntap-20220225-0001/
Third Party Advisory
-
https://jfrog.com/blog/cve-2021-44521-exploiting-apache-cassandra-user-defined-functions-for-remote-code-execution/
Exploit;Mitigation;Third Party Advisory
-
https://lists.apache.org/thread/y4nb9s4co34j8hdfmrshyl09lokm7356
Issue Tracking;Mailing List;Vendor Advisory
Products affected by CVE-2021-44521
- cpe:2.3:a:apache:cassandra:*:*:*:*:*:*:*:*
- cpe:2.3:a:apache:cassandra:*:*:*:*:*:*:*:*
- cpe:2.3:a:apache:cassandra:*:*:*:*:*:*:*:*