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AUSCERT External Security Bulletin Redistribution
ESB-2019.3798
Multiple vulnerabilities in IBM HTTP Server affect IBM
Security Access Manager for Enterprise Single Sign-On
10 October 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Security Access Manager for Enterprise
Publisher: IBM
Operating System: AIX
HP-UX
Linux variants
Windows
Impact/Access: Denial of Service -- Remote/Unauthenticated
Cross-site Scripting -- Remote with User Interaction
Provide Misleading Information -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-10098 CVE-2019-10092 CVE-2018-20843
Reference: ESB-2019.3557
ESB-2019.3525
ESB-2019.3408
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Security Bulletin: Multiple vulnerabilities in IBM HTTP Server affect IBM
Security Access Manager for Enterprise Single Sign-On
Security Bulletin
Summary
These issues were also addressed by IBM WebSphere Application Server
shipped with IBM Security Access Manager for Enterprise Single Sign-On.
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: [23]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
IBM Security Access Manager for Enterprise Single Sign-On 8.2.1, 8.2.2
Remediation/Fixes
Refer to the following security bulletins for vulnerability details and
information about fixes addressed by IBM WebSphere Application Server
which is shipped with IBM Security Access Manager for Enterprise Single
Sign-On.
+------------------------------------------------------------------------+
|Principal Product and|Affected Supporting| Affected Supporting Product |
| Version(s) |Product and Version| Security Bulletin |
|---------------------+-------------------+------------------------------|
|IBM Security Access |IBM WebSphere |[1]Security Bulletin: |
|Manager for |Application Server |Multiple vulnerabilities in |
|Enterprise Single |8.5 |IBM HTTP Server used by |
|Sign-On 8.2.1 | |WebSphere Application Server |
|---------------------+-------------------+------------------------------|
|IBM Security Access |IBM WebSphere |[1]Security Bulletin: |
|Manager for |Application Server |Multiple vulnerabilities in |
|Enterprise Single |8.5 |IBM HTTP Server used by |
|Sign-On 8.2.2 | |WebSphere Application Server |
+------------------------------------------------------------------------+
[1] https://www.ibm.com/support/pages/node/964768
Workarounds and Mitigations
None
*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.
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