CVE-2021-41571 — MEDIUM (6.5)

Q: How severe is CVE-2021-41571?

CVE-2021-41571 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2021-41571?

Check the references section above for vendor advisories and patch information. Affected products include: Apache Pulsar.

Vulnerability Description

In Apache Pulsar it is possible to access data from BookKeeper that does not belong to the topics accessible by the authenticated user. The Admin API get-message-by-id requires the user to input a topic and a ledger id. The ledger id is a pointer to the data, and it is supposed to be a valid it for the topic. Authorisation controls are performed against the topic name and there is not proper validation the that ledger id is valid in the context of such ledger. So it may happen that the user is able to read from a ledger that contains data owned by another tenant. This issue affects Apache Pulsar Apache Pulsar version 2.8.0 and prior versions; Apache Pulsar version 2.7.3 and prior versions; Apache Pulsar version 2.6.4 and prior versions.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Apache	Pulsar	>= 2.6.0, < 2.6.4

Related Weaknesses (CWE)

CWE-863

References

https://github.com/apache/pulsar/issues/11814ExploitIssue TrackingPatch
https://lists.apache.org/thread/8n3k7pvyh4cf9q2jfzb6pb32ync6xlvrMailing ListVendor Advisory
https://pulsar.apache.org/admin-rest-api/#operation/getLastMessageIdPatchVendor Advisory
https://github.com/apache/pulsar/issues/11814ExploitIssue TrackingPatch
https://lists.apache.org/thread/8n3k7pvyh4cf9q2jfzb6pb32ync6xlvrMailing ListVendor Advisory
https://pulsar.apache.org/admin-rest-api/#operation/getLastMessageIdPatchVendor Advisory

FAQ

What is CVE-2021-41571?

CVE-2021-41571 is a vulnerability with a CVSS score of 6.5 (MEDIUM). In Apache Pulsar it is possible to access data from BookKeeper that does not belong to the topics accessible by the authenticated user. The Admin API get-message-by-id requires the user to input a top...

How severe is CVE-2021-41571?

CVE-2021-41571 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-41571?

Check the references section above for vendor advisories and patch information. Affected products include: Apache Pulsar.