Security Bulletin: WebSphere Liberty susceptible to HTTP2 implementation vulnerabilities

Summary

There are multiple vulnerabilities in IBM® WebSphere Liberty ,Version 8.5.5.8 used by IBM Tivoli Application Dependency Discovery Manager (TADDM)

Vulnerability Details

CVEID:CVE-2019-9515
**DESCRIPTION:**Multiple vendors are vulnerable to a denial of service, caused by a Settings Flood attack. By sending a stream of SETTINGS frames to the peer, a remote attacker could consume excessive CPU resources.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/165181 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID:CVE-2019-9518
**DESCRIPTION:**Multiple vendors are vulnerable to a denial of service, caused by a Empty Frame Flooding attack. By sending a stream of frames with an empty payload and without the end-of-stream flag, a remote attacker could consume excessive CPU resources.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/164904 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID:CVE-2019-9517
**DESCRIPTION:**Multiple vendors are vulnerable to a denial of service, caused by an Internal Data Buffering attack. By opening the HTTP/2 window so the peer can send without constraint and sending a stream of requests for a large response object, a remote attacker could consume excessive CPU resources.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/165183 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID:CVE-2019-9512
**DESCRIPTION:**Multiple vendors are vulnerable to a denial of service, caused by a Ping Flood attack. By sending continual pings to an HTTP/2 peer, a remote attacker could consume excessive CPU resources.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/164903 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID:CVE-2019-9514
**DESCRIPTION:**Multiple vendors are vulnerable to a denial of service, caused by a Reset Flood attack. By opening a number of streams and sending an invalid request over each stream, a remote attacker could consume excessive CPU resources.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/164640 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID:CVE-2019-9513
**DESCRIPTION:**Multiple vendors are vulnerable to a denial of service, caused by a Resource Loop attack. By creating multiple request streams and continually shuffling the priority of the streams, a remote attacker could consume excessive CPU resources.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/164639 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Remediation/Fixes

In order to fix this vulnerability, Liberty was upgraded from 8.5.5.8 to 20.0.0.1. This upgrade is now available as part of TADDM 7.3.0.7 (TIV-ITADDM-FP0007) release.

For download of the FixPack, please refer the below FixCentral Link :

Download Link : FixCentral

Note:

• Before TADDM 7.3.0.5, Java 7 was used and the upgraded Liberty version 20.0.0.1 requires Java8. Hence, no eFix can be provided for versions before 7.3.0.5

• There are 4 Security Bulletins of WAS Liberty, which provide the same efix for remediation as they all require an upgrade to WAS Liberty 20.0.0.1. An efix of any of these bulletins can be applied. The bulletins for reference are as follows:

  • Security Bulletin: Bypass security restrictions in WAS Liberty
  • Security Bulletin: Cookie created without secure flag WAS Liberty
  • Security Bulletin: WebSphere Liberty susceptible to HTTP2 implementation vulnerabilities
  • Security Bulletin: Stack is displayed in WebSphere Application Server

Workarounds and Mitigations

None