Security Bulletin: Multiple security vulnerabilities affect IBM WebSphere Application Server in IBM Cloud

Summary

There is an information disclosure due to an XML external entity (XXE) vulnerability when using the OpenSAML features in WebSphere Application Server Liberty. There is an information disclosure vulnerability and a denial of service vulnerability that affect the IBM HTTP Server used by WebSphere Application Server.

Vulnerability Details

CVEID: CVE-2013-6440
DESCRIPTION: OpenSAML could allow a remote authenticated attacker to obtain sensitive information, caused by an error when parsing XML entities. By persuading a victim to open a specially-crafted XML document containing external entity references, an attacker could exploit this vulnerability to obtain sensitive information.
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/89714 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N)

CVEID: CVE-2017-9798
DESCRIPTION: Apache HTTP Server could allow a remote attacker to obtain sensitive information, caused by a flaw in the HTTP OPTIONS method, aka Optionsbleed. By sending an OPTIONS HTTP request, a remote attacker could exploit this vulnerability to obtain sensitive information.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/132159 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)

CVEID: CVE-2017-12618
DESCRIPTION: Apache Portable Runtime Utility (APR-util)is vulnerable to a denial of service, caused by failing to validate the integrity of SDBM database files used by apr_sdbm*() functions. By making a specially-crafted program or process, a local authenticated attacker could exploit this vulnerability to cause the application to crash.
CVSS Base Score: 5.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/134048 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

CVE-2013-6440 affects the following versions and releases of IBM WebSphere Application Server:
Liberty using samlWeb-2.0 feature
Liberty using wsSecuritySaml-1.1 feature

CVE-2017-9798 and CVE-2017-12618 affect the following versions and releases of IBM HTTP Server (powered by Apache) component in all editions of WebSphere Application Server and bundling products.
Version 9.0
Version 8.5

Remediation/Fixes

To patch an existing service instance refer to the IBM WebSphere Application Server bulletins listed below:

Security Bulletin: Information disclosure in WebSphere Application Server Liberty (CVE-2013-6440)

Security Bulletin: Security Vulnerabilities in IBM HTTP Server (CVE-2017-9798, CVE-2017-12618)

Alternatively, delete the vulnerable service instance and create a new instance.

Workarounds and Mitigations

none