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AUSCERT External Security Bulletin Redistribution
ESB-2022.5620
Denial of Service in Splunk Enterprise through search macros
7 November 2022
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AusCERT Security Bulletin Summary
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Product: Splunk Enterprise
Publisher: Splunk
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Resolution: Patch/Upgrade
CVE Names: CVE-2022-43564
Original Bulletin:
https://www.splunk.com/en_us/product-security/announcements/svd-2022-1104.html
Comment: CVSS (Max): 4.9 CVE-2022-43564 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H)
CVSS Source: NVD
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
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SPLUNK / PRODUCT SECURITY / SVD-2022-1104
Denial of Service in Splunk Enterprise through search macros
Advisory ID: CVE ID: CVE-2022-43564
SVD-2022-1104
Published: 2022-11-02 Last Update: 2022-11-02
CVSSv3.1 Score: CVSSv3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N
4.9, Medium /I:N/A:H
CWE: CWE-400 Bug ID: SPL-220964
Description
In Splunk Enterprise versions below 8.1.12, 8.2.9, and 9.0.2, a remote user
who can create search macros and schedule search reports can cause a denial of
service through the use of specially crafted search macros.
Solution
For Splunk Enterprise, upgrade versions to 8.1.12, 8.2.9, or higher.
For Splunk Cloud Platform versions below 9.0.2205, Splunk is actively patching
and monitoring the Splunk Cloud instances. To request an immediate upgrade,
determine which version of Splunk Cloud Platform you're running , then create
a new support case .
Product Status
Product Version Component Affected Version Fixed Version
Splunk Enterprise 8.1 REST API 8.1.11 and lower 8.1.12
Splunk Enterprise 8.2 REST API 8.2.0 to 8.2.8 8.2.9
Splunk Enterprise 9.0 REST API Not affected -
Splunk Cloud Platform - REST API 9.0.2203.4 and lower 9.0.2205
Mitigations and Workarounds
You can use a proxy to filter out requests to the `/services/search/parser`
REST endpoint that include the option `ignore_parse_error=t`. You can either
block these requests entirely or pass them through with that option removed.
Other requests to the same endpoint do not cause the denial of service.
Detections
None
Severity
Splunk rates the vulnerability as Medium, 4.9, with a CVSS Vectors of CVSS:3.1
/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
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