CVE-2023-44981
Authorization Bypass Through User-Controlled Key vulnerability in Apache ZooKeeper.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.71%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Authorization Bypass Through User-Controlled Key vulnerability in Apache ZooKeeper. If SASL Quorum Peer authentication is enabled in ZooKeeper (quorum.auth.enableSasl=true), the authorization is done by verifying that the instance part in SASL authentication ID is listed in zoo.cfg server list. The instance part in SASL auth ID is optional and if it's missing, like 'eve@EXAMPLE.COM', the authorization check will be skipped. As a result an arbitrary endpoint could join the cluster and begin propagating counterfeit changes to the leader, essentially giving it complete read-write access to the data tree. Quorum Peer authentication is not enabled by default. Users are recommended to upgrade to version 3.9.1, 3.8.3, 3.7.2, which fixes the issue. Alternately ensure the ensemble election/quorum communication is protected by a firewall as this will mitigate the issue. See the documentation for more details on correct cluster administration.
- CVSS 3.1
- 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 1.71% probability · 76th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-639
- Affected
- apache/zookeeper · debian/debian linux
- Source
- security@apache.org
References
- http://www.openwall.com/lists/oss-security/2023/10/11/4Mailing List, Third Party Advisory
- https://lists.apache.org/thread/wf0yrk84dg1942z1o74kd8nycg6pgm5bIssue Tracking, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/10/msg00029.htmlMailing List
- https://security.netapp.com/advisory/ntap-20240621-0007/
- https://www.debian.org/security/2023/dsa-5544Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/10/11/4Mailing List, Third Party Advisory
- https://lists.apache.org/thread/wf0yrk84dg1942z1o74kd8nycg6pgm5bIssue Tracking, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/10/msg00029.htmlMailing List
- https://security.netapp.com/advisory/ntap-20240621-0007/
- https://www.debian.org/security/2023/dsa-5544Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.