Security Bulletin: GNU C library (glibc) vulnerability affects <TS4500> (CVE-2015-7547)

Security Bulletin

Summary

A GNU C library (glibc) stack-based buffer overflow in getaddrinfo() vulnerability affects <TS4500>.

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

TS4500 with firmware versions below 1.2.0.3.

Remediation/Fixes

Upgrade to version 1.2.0.3 or later. TS4500 firmware can be found on the IBM Fix Central web site at: https://www-933.ibm.com/support/fixcentral/
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

Disable DNS by removing any valid DNS server addresses under Settings -> Networking from the TS4500 web user interface.

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References

Complete CVSS v2 Guide
On-line Calculator v2

Complete CVSS v3 Guide
On-line Calculator v3

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*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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Tips

Security Bulletin: GNU C library (glibc) vulnerability affects <TS4500> (CVE-2015-7547)