Vulnerability in Apache Spark
CVE-2021-38296
Apache Spark supports end-to-end encryption of RPC connections via "spark.authenticate" and "spark.network.crypto.enabled". In versions 3.1.2 and earlier, it uses a bespoke mutual authentication protocol that allows for full encryption key recovery. After an initial interactive attack, this would allow someone to decrypt plaintext traffic offline. Note that this does not affect security mechanisms controlled by "spark.authenticate.enableSaslEncryption", "spark.io.encryption.enabled", "spark.ssl", "spark.ui.strictTransportSecurity". Update to Apache Spark 3.1.3 or later
EPSS: 0.018 (78.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Apache Spark
- Apache Software Foundation Spark — versions up to and including version 3.1.2
- Oracle Financial_services_crime_and_compliance_management_studio — versions 8.0.8.2.0, 8.0.8.3.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@apache.org (Mailing List, x_refsource_MISC, Vendor Advisory)
- security@apache.org (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-38296?
- CVE-2021-38296 is a high-severity vulnerability in Apache Spark, classified under Authentication Bypass by Capture-replay. CVSS score: 7.5/10. Published 2022-03-10.
- How severe is CVE-2021-38296?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-38296 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.