Home/CVE/A crafted request bypasses S2S TCP Token authentication writing arbitrary events to an index in Splunk Enterprise Indexe
CVE

CVE-2021-31559

A crafted request bypasses S2S TCP Token authentication writing arbitrary events to an index in Splunk Enterprise Indexe

A crafted request bypasses S2S TCP Token authentication writing arbitrary events to an index in Splunk Enterprise Indexer 8.1 versions before 8.1.5 and 8.2 versions before 8.2.1. The vulnerability impacts Indexers configured to use TCPTokens. It does not impact Universal Forwarders.

HIGH · CVSS 7.5 EPSS 0.00198
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-288Authentication Bypass Using an Alternate Path or Channel
▤

Affected Products & Versions

2
splunk>= 8.1.0 and < 8.1.5
splunkall versions
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · prodsec@splunk.com
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 NVD06 May 2022 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
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References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.splunk.com/en_us/product-security/announcements/svd-2022-0503.htmlVendor Advisory
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