CVE-2025-27912

Remediation/Mitigation Strategy for CVE-2025-27912 - Datalust Seq CSRF Vulnerability

This document outlines a remediation and mitigation strategy for CVE-2025-27912, a Cross-Site Request Forgery (CSRF) vulnerability affecting Datalust Seq before version 2024.3.13545.

1. Vulnerability Description:

  • Vulnerability: Cross-Site Request Forgery (CSRF)
  • CVE ID: CVE-2025-27912
  • Affected Product: Datalust Seq (versions prior to 2024.3.13545)
  • Description: The vulnerability stems from a missing Content-Type validation within Datalust Seq. This allows an attacker to craft malicious requests that, when unknowingly triggered by an authenticated user, can perform actions on the Seq server on behalf of that user.
  • Attack Vector:
    • Scenario 1 (Entra ID/OpenID Connect): An attacker crafts a malicious website or injects malicious code into a compromised website. When a logged-in Seq user visits this malicious site, the attacker can potentially trigger actions on the Seq server as that user.
    • Scenario 2 (Username/Password/Active Directory): The attacker hosts a malicious website or compromises a website under the same effective top-level domain (eTLD) as the Seq server. When a logged-in Seq user visits the malicious site, the attacker can potentially trigger actions on the Seq server as that user.
  • Impact: Successful exploitation of this vulnerability allows an attacker to impersonate a legitimate user and perform actions within Seq, such as:
    • Modifying Seq configurations.
    • Deleting or modifying log data.
    • Creating or deleting API keys.
    • Potentially gaining further access to the underlying system, depending on the user’s permissions within Seq.

2. Severity:

  • CVSS Score: 8.8 (High)
  • CVSS Vector: This information is not entirely provided in the excerpt. However, it is possible to deduce the vector based on the information provided:
    • CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H (Likely)
  • Severity Rationale: The high CVSS score is justified because the vulnerability requires low attack complexity and no privileges, only requiring user interaction to trigger. The impact is high, as successful exploitation can compromise the confidentiality, integrity, and availability of the Seq server.

3. Known Exploits:

  • Exploit Availability: While specific public exploits are not explicitly mentioned in the excerpt, the description clearly outlines the mechanism of exploitation. An attacker with moderate web development skills can craft a malicious website containing a CSRF payload targeting the Seq server. Therefore, the exploit is considered relatively easy to develop and potentially available.

4. Remediation Strategy:

The primary remediation is to upgrade Datalust Seq to a version that includes a fix for CVE-2025-27912 (version 2024.3.13545 or later).

  • Step 1: Upgrade Seq Server:
    • Action: Upgrade the Datalust Seq server to the latest available version (2024.3.13545 or later) as provided by Datalust.
    • Priority: Critical
    • Timeline: Immediate. Apply this upgrade as soon as possible.
    • Procedure: Refer to the official Datalust Seq documentation for upgrade instructions. Ensure a proper backup of the Seq data is performed before initiating the upgrade process. Test the upgraded server in a staging environment before deploying to production.
  • Step 2: Verification:
    • Action: After the upgrade, verify that the vulnerability is resolved by:
      • Reviewing the Datalust Seq release notes to confirm the fix for CVE-2025-27912 is included.
      • Performing penetration testing or vulnerability scanning to confirm the absence of the vulnerability.
    • Priority: High
    • Timeline: Immediately following the upgrade.

5. Mitigation Strategy (If Upgrade is Not Immediately Possible):

If an immediate upgrade is not feasible, consider these mitigation steps:

  • Step 1: Implement SameSite Cookie Attribute:
    • Action: Configure the Seq server to set the SameSite cookie attribute to Strict or Lax for all session cookies. This will help prevent cross-site requests from including the session cookie, mitigating CSRF attacks.
    • Priority: High
    • Configuration: The specific configuration method will depend on the Seq server’s settings. Consult the Seq documentation or contact Datalust support for guidance.
  • Step 2: Input Validation and Output Encoding:
    • Action: Review custom configurations and ensure proper input validation and output encoding is being implemented to prevent unintended code execution.
    • Priority: Medium
    • Configuration: The specific validation and encoding methods will depend on the Seq server’s settings. Consult the Seq documentation or contact Datalust support for guidance.
  • Step 3: User Awareness Training:
    • Action: Educate Seq users about the risks of CSRF attacks and the importance of:
      • Being cautious about clicking on links in emails or websites from untrusted sources.
      • Avoiding browsing untrusted websites while logged into Seq.
      • Regularly logging out of Seq when not in use.
    • Priority: Medium
    • Timeline: Ongoing
  • Step 4: Web Application Firewall (WAF) Rules:
    • Action: If a Web Application Firewall (WAF) is in use, create or enable rules to detect and block suspicious requests that may be indicative of CSRF attacks targeting the Seq server. Specifically, look for requests lacking a proper Content-Type header when one is expected.
    • Priority: Medium
    • Configuration: The specific WAF rule configuration will depend on the WAF solution in use.

6. Monitoring:

  • Continuously monitor Seq server logs for suspicious activity or anomalies that could indicate a CSRF attack attempt.
  • Implement intrusion detection systems (IDS) to alert on unusual network traffic patterns targeting the Seq server.

7. Communication:

  • Communicate the vulnerability and remediation steps to all relevant stakeholders, including IT staff, security teams, and Seq users.

8. Disclaimer:

This remediation and mitigation strategy is based on the information provided in the excerpt. It is recommended to consult the official Datalust Seq documentation and security advisories for the most accurate and up-to-date information. This document is for informational purposes only and should not be considered as professional security advice.

Assigner

Date

  • Published Date: 2025-03-11 00:00:00
  • Updated Date: 2025-03-11 08:15:12

More Details

CVE-2025-27912