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Security Bulletin: IBM Security Access Manager for Web is affected by security vulnerabilities in libxml2

Security Bulletin


Summary

Vulnerabilities have been identified in the libxml2 library, which is a development toolbox providing the implementation of various XML standards.

IBM Security Access Manager for Web uses libxml2 and is affected by these vulnerabilities.

Vulnerability Details

CVEID: CVE-2016-4448
DESCRIPTION:
 libxml2 could allow a remote attacker to execute arbitrary code on the system, caused by a format string error. By using a specially crafted html file containing malicious format specifiers, a remote attacker could exploit this vulnerability to execute arbitrary code on the system or cause the application to crash.
CVSS Base Score: 7.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/113523 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID: CVE-2016-4449
DESCRIPTION:
 libxml2 could allow a remote attacker to obtain sensitive information, caused by a XML external entity (XXE) error when processing XML data by the XML parser. 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/113524 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-2016-3627
DESCRIPTION:
 libxml2 is vulnerable to a denial of service, caused by an error in the xmlStringGetNodeList() function when parsing xml files while in recover mode. An attacker could exploit this vulnerability to exhaust the stack and cause a segmentation fault.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/111586 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-3705
DESCRIPTION:
 libxml2 is vulnerable to a stack-based buffer overflow, caused by an out-of-bounds read of xmlParserEntityCheck() and xmlParseAttValueComplex() functions in parser.c. By persuading a victim to open a specially crafted XML file, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
CVSS Base Score: 6.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112885 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L)

CVEID: CVE-2016-4447
DESCRIPTION:
 libxml2 is vulnerable to a denial of service, caused by a heap-based buffer overflow. By persuading a victim to open a specially crafted XML file, a remote attacker could overflow a buffer and cause the application to crash.
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/113522 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

Affected Products and Versions

IBM Security Access Manager for Web 7.0 appliances

IBM Security Access Manager for Web 8.0, all firmware versions

IBM Security Access Manager 9.0, all firmware versions

Remediation/Fixes

IBM has provided patches for all affected versions. Follow the installation instructions in the README files included with the patch.

Product VRMF APAR Remediation
IBM Security Access Manager for Web 7.0 (appliance) IV80986 Apply Interim Fix 26:
7.0.0-ISS-WGA-IF0026
IBM Security Access Manager for Web 8.0.0.0 -
8.0.1.4
IV89324 1. For versions prior to 8.0.1.4, upgrade to 8.0.1.4:
8.0.1-ISS-WGA-FP0004
2. Apply 8.0.1.4 Interim Fix 2:
8.0.1.4-ISS-WGA-IF0003
IBM Security Access Manager 9.0 -
9.0.1.0
IV89330 1. For versions prior to 9.0.1.0, upgrade to 9.0.1.0:
IBM Security Access Manager V9.0.1 Multiplatform, Multilingual (CRW4EML)
2. Apply 9.0.1.0 Interim Fix 5:
9.0.1.0-ISS-ISAM-IF0005

Workarounds and Mitigations

None.

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References

Related information

Change History

September 21, 2016: Original version 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 information

More support for: IBM Security Access Manager for Web

Software version: 7.0, 8.0, 8.0.0.2, 8.0.0.4, 8.0.0.5, 8.0.1, 8.0.1.2, 8.0.1.3, 8.0.1.4, 9.0, 9.0.0.1, 9.0.1

Operating system(s): Appliance

Reference #: 1990838

Modified date: 26 September 2016