VDB-238340 · CVE-2023-40593 · SVD-2023-0802

Splunk Enterprise up to 8.2.12/9.0.6 SAML REST Endpoint /saml/acs denial of service

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.6	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Splunk Enterprise up to 8.2.12/9.0.6 and classified as problematic. This vulnerability affects unknown code of the file /saml/acs of the component SAML REST Endpoint. Such manipulation leads to denial of service. This vulnerability is referenced as CVE-2023-40593. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Splunk Enterprise up to 8.2.12/9.0.6 (Log Management Software). Affected by this issue is an unknown code of the file /saml/acs of the component SAML REST Endpoint. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. CVE summarizes:

In Splunk Enterprise versions lower than 9.0.6 and 8.2.12, a malicious actor can send a malformed security assertion markup language (SAML) request to the `/saml/acs` REST endpoint which can cause a denial of service through a crash or hang of the Splunk daemon.

The weakness was published 08/30/2023 as SVD-2023-0802. The advisory is shared for download at advisory.splunk.com. This vulnerability is handled as CVE-2023-40593 since 08/16/2023. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Log Management Software

Vendor

Splunk

Name

Enterprise

Version

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.6

VulDB Base Score: 3.1
VulDB Temp Score: 3.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 6.3
CNA Vector (Splunk Inc.): 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/16/2023 🔍
08/30/2023 +14 days 🔍
08/30/2023 +0 days 🔍
09/22/2023 +23 days 🔍

Sourcesinfo

Advisory: SVD-2023-0802
Status: Confirmed

CVE: CVE-2023-40593 (🔍)
GCVE (CVE): GCVE-0-2023-40593
GCVE (VulDB): GCVE-100-238340

Entryinfo

Created: 08/30/2023 19:30
Updated: 09/22/2023 21:27
Changes: 08/30/2023 19:30 (51), 09/22/2023 21:27 (11)
Complete: 🔍
Cache ID: 216::103