VMSA-2017-0017

VMware vCenter Server update resolves LDAP DoS, SSRF and CRLF injection issues

VMware Security Advisory
 
VMware Security Advisory Advisory ID:
  VMSA-2017-0017
VMware Security Advisory Severity:
  Moderate
VMware Security Advisory Synopsis:
  VMware vCenter Server update resolves LDAP DoS, SSRF and CRLF injection issues
VMware Security Advisory Issue date:
  2017-11-09
VMware Security Advisory Updated on:
  2017-11-09 (Initial Advisory)
VMware Security Advisory CVE numbers:
  CVE-2017-4927, CVE-2017-4928
 
1. Summary

VMware vCenter Server update resolves LDAP DoS, SSRF and CRLF injection issues

2. Relevant Products
  • VMware vCenter Server
3. Problem Description

a. VMware vCenter Server LDAP Denial of Service (DoS).

VMware vCenter Server doesn't correctly handle specially crafted LDAP network packets which may allow for remote DoS.

 

VMware would like to thank Honggang Ren of Fortinet's FortiGuard Labs for reporting this issue to us.   

 

The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the identifier CVE-2017-4927 to this issue.

 

Column 5 of the following table lists the action required to remediate the vulnerability in each release, if a solution is available.

VMware Product
Product Version
Running on
Severity
Replace with/ Apply Patch
Workaround
VMware Product vCenter Server
Product Version 6.5
Running on Any
Severity Moderate
Replace with/ Apply Patch 6.5 U1
Workaround None
VMware Product vCenter Server
Product Version 6.0
Running on Any
Severity Moderate
Replace with/ Apply Patch 6.0 U3c
Workaround None
VMware Product vCenter Server
Product Version 5.5
Running on Any
Severity N/A
Replace with/ Apply Patch Not affected
Workaround N/A

 

 

b. SSRF and CRLF injection issues in vSphere Web client

 

The Flash-based vSphere Web Client (i.e. not the new HTML5-based vSphere Client) contains server side request forgery (SSRF) and CRLF injection issues due to improper neutralization of URLs. An attacker may exploit these issues by sending a POST request with modified headers towards internal services leading to information disclosure.     

 

VMware would like to thank ricterzheng @ Tencent Yunding Lab for reporting this issue to us. 

 

The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the identifier CVE-2017-4928 to this issue.

 

Column 5 of the following table lists the action required to remediate the vulnerability in each release, if a solution is available.

VMware Product
Product Version
Running on
Severity
Replace with/ Apply Patch
Workaround
VMware Product vCenter Server
Product Version 6.5
Running on Any
Severity N/A
Replace with/ Apply Patch Not affected
Workaround N/A
VMware Product vCenter Server
Product Version 6.0
Running on Any
Severity Moderate
Replace with/ Apply Patch 6.0 U3c
Workaround None
VMware Product vCenter Server
Product Version 5.5
Running on Any
Severity Moderate
Replace with/ Apply Patch 5.5 U3f
Workaround None

 

 

4. Solution

 

Please review the patch/release notes for your product and version and verify the checksum of your downloaded file.

 

VMware vCenter Server 6.5 U1

Downloads:

https://my.vmware.com/web/vmware/details?downloadGroup=VC65U1&productId=614&rPId=17343

Documentation:

https://docs.vmware.com/en/VMware-vSphere/index.html

 

VMware vCenter Server 6.0 U3c

Downloads:

https://my.vmware.com/web/vmware/details?productId=491&downloadGroup=VC60U3

Documentation:         

https://docs.vmware.com/en/VMware-vSphere/index.html

 

VMware vCenter Server 5.5 U3f

Downloads:

https://my.vmware.com/web/vmware/details?productId=353&downloadGroup=VC55U3F

Documentation:  

        https://docs.vmware.com/en/VMware-vSphere/index.html

 

 

 

 

5. References

 

          http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-4927 

          http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-4928 

          http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-4929 

         

    

6. Change log

 

2017-11-09 VMSA-2017-0017

Initial security advisory in conjunction with the release of vCenter Server 6.0 U3c on 2017-11-09.

 

7. Contact

 

E-mail list for product security notifications and announcements:

http://lists.vmware.com/cgi-bin/mailman/listinfo/security-announce

 

This Security Advisory is posted to the following lists:

security-announce@lists.vmware.com

bugtraq@securityfocus.com

fulldisclosure@seclists.org

 

E-mail: security@vmware.com

PGP key at: https://kb.vmware.com/kb/1055

 

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Consolidated list of VMware Security Advisories

http://kb.vmware.com/kb/2078735

 

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VMware Security & Compliance Blog  

https://blogs.vmware.com/security

 

Twitter

https://twitter.com/VMwareSRC

 

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