Security Bulletin
Summary
A GNU C library (glibc) stack-based buffer overflow in getaddrinfo() vulnerability affects IBM Security Access Manager for Web.
Vulnerability Details
CVEID: CVE-2015-7547
DESCRIPTION: GNU C Library (glibc) is vulnerable to a stack-based buffer overflow, caused by improper bounds checking by the nss_dns backend for the getaddrinfo() function when performing dual A/AAAA DNS queries. By sending a specially crafted DNS response, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
CVSS Base Score: 8.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/110662 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
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 for Web 9.0, all firmware versions
Remediation/Fixes
The table below provides links to patches for all affected versions. Follow the installation instructions in the README file included with the patch.
| Product | VRMF | APAR | Remediation |
| IBM Security Access Manager for Web | 7.0 (appliance) | IV81894 | 1. Apply Interim Fix 22: 7.0.0-ISS-WGA-IF0022 |
| IBM Security Access Manager for Web | 8.0.0.0 - 8.0.1.3 | IV81882 | 1. For 8.0-8.0.1.2 environments, upgrade to 8.0.1.3: 8.0.1-ISS-WGA-FP0003 2. Apply 8.0.1.3 Interim Fix 5:8.0.1.3-ISS-WGA-IF0005 |
| IBM Security Access Manager | 9.0 | IV81837 | 1. For 9.0 environments, upgrade to 9.0.0.1: 9.0.0-ISS-ISAM-FP0001 2. Apply 9.0.0.1 Interim Fix 2: 9.0.0.1-ISS-ISAM-IF0002 |
Once updates have been applied, any process using glibc will need to be restarted. Given that nearly all system processes use glibc, rebooting after upgrading is suggested.
IBM recommends that you review your entire environment to identify vulnerable releases of glibc including your Operating Systems and take appropriate mitigation and remediation actions. Please contact your Operating System provider for more information.
Workarounds and Mitigations
None.
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References
Acknowledgement
None.
Change History
29 February 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
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
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Document Information
Modified date:
16 June 2018
UID
swg21977374