Vulnerability in Apache Pulsar
CVE-2021-22160
If Apache Pulsar is configured to authenticate clients using tokens based on JSON Web Tokens (JWT), the signature of the token is not validated if the algorithm of the presented token is set to "none". This allows an attacker to connect to Pulsar instances as any user (incl. admins).
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.529 (99.0th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.529 · newest: 0.529 · change: 0.000
Affected products
- Apache Pulsar
- Apache Software Foundation Pulsar — versions Apache Pulsar
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.apache.org/thread.html/r347650d15a3e9c5f58b83e918b6ad6dedc2a63d3eb63da8e6… (Mailing List, Vendor Advisory)
- lists.apache.org/thread.html/rf2e90942996dceebac8296abf39257cfeb5ae918f82f7af3d… (mailing-list)
- lists.apache.org/thread.html/ra49cb62105154e4795b259c79a6b27d63bfa2ab5787ff8529… (mailing-list)
- lists.apache.org/thread.html/ra49cb62105154e4795b259c79a6b27d63bfa2ab5787ff8529… (mailing-list)
- lists.apache.org/thread.html/r8e545559781231a83bf0644548c660255859e52feb86bbfcd… (mailing-list)
- lists.apache.org/thread.html/r9a12b4da2f26ce9b8f7e7117a879efaa973dab7e54717bbc7… (Vendor Advisory, mailing-list, Mailing List)
- lists.apache.org/thread.html/rbe845aa1573a61769b9c5916c62971f4b10de87c2ea5f38a9… (mailing-list)
- lists.apache.org/thread.html/rca54f4b26ba5e6f2e39732b47ec51640e89f57e3b6a38ac3b… (mailing-list)
Frequently asked questions
- What is CVE-2021-22160?
- CVE-2021-22160 is a critical-severity vulnerability in Apache Pulsar, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.8/10. Published 2021-05-26.
- How severe is CVE-2021-22160?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-22160 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.