Security Bulletin: A vulnerability in Apache Tomcat affects the IBM FlashSystem models 840 and 900

Summary

A vulnerability in Apache Tomcat (CVE-2020-13935) affects the IBM FlashSystem models 840 and 900.

Vulnerability Details

CVEID:CVE-2020-13935
**DESCRIPTION:**Apache Tomcat is vulnerable to a denial of service, caused by improper validation of the payload length in a WebSocket frame. By sending multiple requests with invalid payload lengths, a remote attacker could exploit this vulnerability to cause the application to enter into an infinite loop.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/185227 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

Affected Products and Versions

Storage Node machine type and models (MTMs) affected:

• 9840-AE1 and 9843-AE1
• 9840-AE2 and 9843-AE2
• 9840-AE3 and 9843-AE3

Supported storage node code versions which are affected:

• VRMFs prior to 1.5.2.8
• VRMFs prior to 1.6.1.3

**Note:**For information on IBM FlashSystem V9000 SVC code levels affected and remediated, search for the equivalent security bulletin here: IBM Support

Remediation/Fixes

9840-AE1 and 9843-AE1

FlashSystem 900 MTMs:

9843-UF3, 9840-AE2, 9843-AE2, 9840-AE3, and 9843-AE3

Note: AE1 systems are no longer supported.

|

Code fixes are now available, the minimum VRMF containing the fix depending on the code stream:

Fixed Code VRMF:

1.6 stream: 1.6.1.3

1.5 stream: 1.5.2.8

| N/A | FlashSystem 900 fixes are available at IBM’s Fix Central website. FlashSystem 840 is no longer supported.

Workarounds and Mitigations

Upgrade to the latest supported firmware.