Vulnerability in Splunk
CVE-2021-31559
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.
Published · last modified .
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:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.009 (57.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: +0.000
Affected products
- Splunk — versions 8.2.0
- Splunk Enterprise — versions 8.2 version(s) before 8.2.1, Version(s) before 8.1.5
Weakness classification (CWE)
References
- www.splunk.com/en_us/product-security/announcements/svd-2022-0503.html (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-31559?
- CVE-2021-31559 is a high-severity vulnerability in Splunk, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 7.5/10. Published 2022-05-06.
- How severe is CVE-2021-31559?
- High severity. CVSS v3 base score is 7.5 out of 10.