{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/token-exposure/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":["cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*"],"_cs_cves":[{"cvss":7.2,"id":"CVE-2024-29945"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Splunk Enterprise (\u003c 9.2.1)","Splunk Enterprise (\u003c 9.1.4)","Splunk Enterprise (\u003c 9.0.9)","Splunk Cloud"],"_cs_severities":["high"],"_cs_tags":["splunk","vulnerability","token-exposure","log-analysis","application"],"_cs_type":"advisory","_cs_vendors":["Splunk"],"content_html":"\u003cp\u003eThis brief details the implications of CVE-2024-29945, a vulnerability affecting Splunk Enterprise versions prior to 9.2.1, 9.1.4, and 9.0.9, as well as Splunk Cloud. The vulnerability causes sensitive authentication tokens, specifically JSON Web Tokens (JWTs), to be inadvertently logged in \u003ccode\u003esplunkd\u003c/code\u003e debug logs when the \u003ccode\u003eJsonWebToken\u003c/code\u003e component is configured for DEBUG level logging. If an attacker gains access to the underlying Splunk server's file system or its internal logs, these exposed tokens can be retrieved and reused to bypass authentication, gaining unauthorized access to the Splunk environment. This could lead to a range of malicious activities, including sensitive data exfiltration, privilege escalation within Splunk, and ultimately, a full compromise of the Splunk deployment. This exposure highlights the critical need for proper log configuration and timely patching to mitigate significant security risks.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003e\u003cstrong\u003eInitial Access to Splunk Server/Logs:\u003c/strong\u003e An attacker first obtains unauthorized access to the Splunk server's underlying operating system or gains privileged access to Splunk's internal logging mechanisms (e.g., via a compromised administrative account or another vulnerability).\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eLocate Debug Logs:\u003c/strong\u003e The attacker navigates to the Splunk internal log directories (e.g., \u003ccode\u003e/opt/splunk/var/log/splunk/splunkd.log\u003c/code\u003e on Linux) where \u003ccode\u003esplunkd\u003c/code\u003e debug logs are stored.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eIdentify Token Exposure:\u003c/strong\u003e The attacker searches through the \u003ccode\u003esplunkd\u003c/code\u003e logs for entries originating from the \u003ccode\u003eJsonWebToken\u003c/code\u003e component at \u003ccode\u003eDEBUG\u003c/code\u003e log level, specifically looking for messages like \u0026quot;Validating token:\u0026quot;.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eExtract JWT:\u003c/strong\u003e The attacker parses the identified log entries to extract the full JSON Web Token (JWT) value, which contains authentication credentials.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eToken Replay/Impersonation:\u003c/strong\u003e The extracted JWT is then used to craft authenticated API requests or session cookies, allowing the attacker to impersonate the legitimate user whose token was exposed.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eUnauthorized Access to Splunk:\u003c/strong\u003e The attacker gains unauthorized access to the Splunk user's account, bypassing normal authentication processes.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eData Exfiltration/Privilege Escalation:\u003c/strong\u003e With compromised access, the attacker can then exfiltrate sensitive data stored or processed by Splunk, create new users, modify configurations, or escalate privileges within the Splunk environment.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eFull Compromise:\u003c/strong\u003e Ultimately, the attacker may achieve full control over the Splunk deployment, leveraging its capabilities for further reconnaissance, lateral movement, or destruction of data.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eThe impact of CVE-2024-29945 is severe, as exposed authentication tokens can serve as direct access keys to a Splunk environment. If successfully exploited, attackers can gain unauthorized access to all data and functionalities accessible by the compromised token's legitimate owner, potentially leading to sensitive data exfiltration, system tampering, and privilege escalation. While specific victim counts are not publicly disclosed, this vulnerability affects widely deployed Splunk Enterprise and Splunk Cloud instances across all sectors. Organizations using affected versions face risks including compliance violations due to data breaches, operational disruption, and significant reputational damage. The ability to bypass authentication can compromise the integrity and confidentiality of an organization's critical monitoring and security intelligence platform.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003ePatch CVE-2024-29945 immediately:\u003c/strong\u003e Update Splunk Enterprise to versions 9.2.1, 9.1.4, 9.0.9, or later to address CVE-2024-29945, which mitigates the token exposure in debug logs.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eDeploy the provided Sigma rule:\u003c/strong\u003e Implement the \u0026quot;Detect Splunk Authentication Token Exposure in Debug Logs\u0026quot; Sigma rule in your SIEM to identify instances where JWTs are logged in plain text within \u003ccode\u003esplunkd\u003c/code\u003e debug logs.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eConfigure Splunk logging:\u003c/strong\u003e Review and adjust Splunk logging configurations to ensure \u003ccode\u003eJsonWebToken\u003c/code\u003e component logging is not set to \u003ccode\u003eDEBUG\u003c/code\u003e level in production environments unless absolutely necessary for troubleshooting.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eMonitor internal Splunk logs:\u003c/strong\u003e Routinely monitor Splunk internal logs (\u003ccode\u003e_internal\u003c/code\u003e index) for the behavior described in the \u0026quot;Detect Splunk Authentication Token Exposure in Debug Logs\u0026quot; rule, specifically for events containing \u003ccode\u003eValidating token:\u003c/code\u003e from the \u003ccode\u003eJsonWebToken\u003c/code\u003e component.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-07-03T13:37:02Z","date_published":"2026-07-03T13:37:02Z","id":"https://feed.craftedsignal.io/briefs/2026-07-splunk-token-exposure/","summary":"A critical vulnerability, CVE-2024-29945, allows for the exposure of authentication tokens in debug logs within Splunk Enterprise and Splunk Cloud, enabling an attacker with access to internal log files to gain unauthorized access, exfiltrate data, and potentially achieve full compromise of the Splunk infrastructure if unpatched versions (prior to 9.2.1, 9.1.4, and 9.0.9 for Enterprise) are in use.","title":"Splunk Authentication Token Exposure in Debug Logs (CVE-2024-29945)","url":"https://feed.craftedsignal.io/briefs/2026-07-splunk-token-exposure/"}],"language":"en","title":"CraftedSignal Threat Feed - Token-Exposure","version":"https://jsonfeed.org/version/1.1"}