Splunk 4.2.5 addresses three vulnerabilities

Description

Splunk version 4.2.5 addresses three vulnerabilities:

• Reflected XSS in SplunkWeb (SPL-44614) (CVE-2011-4778)
• Remote Code Execution in Splunk Web (SPL-45172) (CVE-2011-4642)
• Directory traversal in Splunk (SPL-45243) (CVE-2011-4643)

At the time of this announcement, Splunk is not aware of any cases where this vulnerability has been exploited. Splunk recommends that customers upgrade any instances of Splunk to the latest maintenance release as soon as possible.

Splunk also recommends that you apply as many components of the Splunk Hardening Standards as possible to mitigate the risk and impact of exploitation.

Affected Products and Components

Security vulnerabilities addressed by this maintenance release affect the following versions of Splunk running Splunk Web:

• SPL-44614 (CVE-2011-4778) and SPL-45172 (CVE-2011-4642): Splunk 4.2 through 4.2.4
• SPL-45243 (CVE-2011-4643): Splunk 4.0 through 4.2.4

Both SPL-44614 (CVE-2011-4778) and SPL-45172 (CVE-2011-4642) affect the Splunk Web component of the Splunk server software. Splunk Web refers to the web server used to deliver the Splunk user interface to the client browser.

Mitigation and Upgrades

Splunk recommends that all vulnerable instances of Splunk be updated to the latest maintenance release.

Splunk Version Recommendation 4.0 through 4.2.4 Upgrade to the latest maintenance release

Splunk releases are cumulative, meaning that releases posted subsequent to those we are posting today will contain these fixes to these vulnerabilities as well as new features and fixes to other bugs and flaws.

Credit

For SPL-44614 (CVE-2011-4778), Splunk would like to credit Emmanuel Bouillon of the NATO C3 Agency with the responsible disclosure of this issue.

For SPL-45172 (CVE-2011-4642) and SPL-45243 (CVE-2011-4643), Splunk would like to credit Gary Oleary-Steele with the responsible disclosure of this issue.

Vulnerability Descriptions and Ratings

The following are descriptions and ratings for vulnerabilities that are fixed in the newest maintenance releases. Descriptions and ratings for previous security fixes can be found in previous Product Security Announcements on our Product Security Portal.

SPL numbers are to be used in communication with Splunk to address specific vulnerabilities. If there is no CVE listed with the vulnerability, the CVE will be added as it is posted.

Reflected XSS in SplunkWeb (SPL-44614) (CVE-2011-4778)

Description: A reflected cross-site scripting vulnerability was identified in Splunk Web. An attacker could trick a user into clicking a specially crafted link that would disclose a valid Splunk session key to the attacker.

Versions Affected: Splunk 4.2 - 4.2.4

Credit: Splunk would like to credit Emmanuel Bouillon of the NATO C3 Agency with the responsible disclosure of this issue.

CVSS Severity (version 2.0):

CVSS Base Score 5.5

CVSS Impact Subscore 4.9

CVSS Exploitability Subscore 8.0

CVSS Version 2 Metrics

• Access Vector: Network
• Access Complexity: Low
• Authentication: Single instance
• Impact Type:
• Allows partial confidentiality and integrity violation
• Exploitability: Proof of concept code
• Remediation Level: Official fix
• Report Confidence: Confirmed

  Mitigation and Remediation:

• Splunk recommends upgrading to the latest maintenance release supplied by Splunk.

Remote Code Execution in Splunk Web (SPL-45172) (CVE-2011-4642)

Description: A remote code execution vulnerability was identified in Splunk Web. An attacker could trick a Splunk admin in to visiting a malicious web page or clicking on a specially crafted link which would result in arbitrary code execution on the Splunk server. By default, non-admin Splunk users are not susceptible to this vulnerability.

Versions Affected: Splunk 4.2 - 4.2.4

Credit: Splunk would like to credit Gary Oleary-Steele with the responsible disclosure of this issue.

CVSS Severity (version 2.0):

CVSS Base Score 7.1

CVSS Impact Subscore 10.0

CVSS Exploitability Subscore 3.9

CVSS Version 2 Metrics

• Access Vector: Network
• Access Complexity: High
• Authentication: Single Instance
• Impact Type:
  • Allows full confidentiality, integrity, and availability violation
• Exploitability: Proof of concept code
• Remediation Level: Official fix
• Report Confidence: Confirmed

  Mitigation and Remediation:

• Splunk recommends upgrading to the latest maintenance release supplied by Splunk.

  Directory Traversal in Splunk (SPL-45243) (CVE-2011-4643)

  Description: A directory traversal vulnerability was identified in Splunk Web and the Splunkd HTTP Server. A normal Splunk user could exploit this information to read sensitive information from the Splunk server.

Versions Affected: Splunk 4.0 - 4.2.4

Credit: Splunk would like to credit Gary Oleary-Steele with the responsible disclosure of this issue.

CVSS Severity (version 2.0):

CVSS Base Score 7.9

CVSS Impact Subscore 8.2

CVSS Exploitability Subscore 6.8

CVSS Version 2 Metrics

• Access Vector: Network
• Access Complexity: Medium
• Authentication: Single Instance
• Impact Type:
• Allows full confidentiality and integrity violation
• Exploitability: Proof of concept code
• Remediation Level: Official fix
• Report Confidence: Confirmed

  Mitigation and Remediation:

• Splunk recommends upgrading to the latest maintenance release supplied by Splunk.

  Document History

• 2011-December-12: Rev 1. Initial Release
• 2011-December-15: Rev 2. Including SPL-45243 which was mistakenly omitted from Rev. 1 and fixing text affected by this addition.
• 2011-December-16: Rev 3. Updating copy under “Description” section to correctly indicate Splunk’s recommendations.
• 2011-December-20: Rev 4. Adding assigned CVE numbers.