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Security Bulletin: Multiple vulnerabilities in IBM HTTP Server used by WebSphere Application Server

Security Bulletin


Summary

There are multiple vulnerabilities in the IBM HTTP Server used by WebSphere Application Server.

Vulnerability Details

CVEID: CVE-2018-20843
DESCRIPTION: libexpat is vulnerable to a denial of service, caused by an error in the XML parser. By persuading a victim to open a specially-crafted file, a remote attacker could exploit this vulnerability to consume all available CPU resources.
CVSS Base Score: 3.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/163073 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L)

CVEID: CVE-2019-10092
DESCRIPTION: Apache HTTP Server is vulnerable to cross-site scripting, caused by improper validation of user-supplied input by the mod_proxy error page. A remote attacker could cause the link on the error page to be malfomed and instead point to a page of their choice. An attacker could use this vulnerability to steal the victim''s cookie-based authentication credentials.
CVSS Base Score: 4.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/165367 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N)

CVEID: CVE-2019-10098
DESCRIPTION: Apache HTTP Server could allow a remote attacker to conduct phishing attacks, caused by an open redirect vulnerability in the mod_rewrite module. An attacker could exploit this vulnerability using a specially-crafted URL to redirect a victim to arbitrary Web sites.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/165366 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N)

Affected Products and Versions

This vulnerability affects the following version and release of IBM HTTP Server (powered by Apache) component in all editions of WebSphere Application Server and bundling products.

  • Version 9.0
  • Version 8.5
  • Version 8.0
  • Version 7.0

Remediation/Fixes

For V9.0.0.0 through 9.0.5.0:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH14974
--OR--
· Apply Fix Pack 9.0.5.1 or later (targeted availability 3Q 2019).
For V8.5.5.0 through 8.5.5.16:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH14974
--OR--
· Apply Fix Pack 8.5.5.17 or later (targeted availability 1Q 2020).
For V8.0.0.0 through 8.0.0.15:
· Upgrade to 8.0.0.15 and then apply Interim Fix PH14974 
 
For V7.0.0.0 through 7.0.0.45:
· Upgrade to 7.0.0.45 then apply Interim Fix PH14974

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Important Note

IBM strongly suggests that all System z customers be subscribed to the System z Security Portal to receive the latest critical System z security and integrity service. If you are not subscribed, see the instructions on the System z Security web site. Security and integrity APARs and associated fixes will be posted to this portal. IBM suggests reviewing the CVSS scores and applying all security or integrity fixes as soon as possible to minimize any potential risk.

References

Off

Change History

18 September 2019: original document published

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Document Location

Worldwide

[{"Business Unit":{"code":"BU004","label":"Hybrid Cloud"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Component":"IBM HTTP Server","Platform":[{"code":"PF002","label":"AIX"},{"code":"PF010","label":"HP-UX"},{"code":"PF016","label":"Linux"},{"code":"PF027","label":"Solaris"},{"code":"PF033","label":"Windows"},{"code":"PF035","label":"z/OS"}],"Version":"7.0;8.0;8.5;9.0","Edition":"Advanced, Base, Enterprise, Network Deployment, Single Server"}]

Document Information

Modified date:
18 September 2019

UID

ibm10964768