Home/CVE/Apache Spark supports end-to-end encryption of RPC connections via "spark.authenticate" and "spark.network.crypto.enable
CVE

CVE-2021-38296

Apache Spark supports end-to-end encryption of RPC connections via "spark.authenticate" and "spark.network.crypto.enable

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.

HIGH · CVSS 7.5 EPSS 0.02147
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-294Authentication Bypass by Capture-replay
CWE-294Authentication Bypass by Capture-replay
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Affected Products & Versions

2
apache spark< 3.1.3
oracle financial services crime and compliance management studioall versions
▤

Affected Packages

2
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Maven org.apache.spark:spark-core HIGH fixed in 3.1.3
PyPI pyspark fixed in 3.1.3
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Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security@apache.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD10 Mar 2022 · 09:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
⚑

Vendor Advisories

1
oracle-cpuoracle-cpu-Oracle-Financial-Services-Crime-and-Compliance-Management-Studio-13595--CVE-2021-38296
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://lists.apache.org/thread/70x8fw2gx3g9ty7yk0f2f1dlpqml2smdMailing ListVendor Advisory
https://www.oracle.com/security-alerts/cpujul2022.htmlPatchThird Party Advisory
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