Security Bulletin: Vulnerabilities in GNU C library (glibc) affect IBM BladeCenter Advanced Management Module (AMM) (CVE-2015-7547 CVE-2015-8776 CVE-2015-8777)

Vulnerability Details

Summary

Vulnerabilities in GNU C library (glibc), including a stack-based buffer overflow in getaddrinfo(), affect IBM BladeCenter Advanced Management Module (AMM).

Vulnerability Details:

CVE-ID: 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 http://exchange.xforce.ibmcloud.com/vulnerabilities/110662 for 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)

CVE-ID: CVE-2015-8776

Description: GNU C Library (glibc) is vulnerable to a denial of service. By passing out-of-range time values to the strftime function, a remote attacker could exploit this vulnerability to cause a segmentation fault or obtain sensitive information.

CVSS Base Score: 6.5
CVSS Temporal Score: See http://exchange.xforce.ibmcloud.com/vulnerabilities/110675 for current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L)

CVE-ID: CVE-2015-8777

Description: GNU C Library (glibc or libc6) could allow a local attacker to bypass security restrictions, caused by an error in elf/rtld.c. By using a zero value of the LD_POINTER_GUARD environment variable, an attacker could exploit this vulnerability to bypass access restrictions.

CVSS Base Score: 5.1
CVSS Temporal Score: See http://exchange.xforce.ibmcloud.com/vulnerabilities/109775 for current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)

Affected Products and Versions

Remediation/Fixes:

Firmware fix versions are available on Fix Central:
http://www.ibm.com/support/fixcentral/.

You should verify applying this fix does not cause any compatibility issues.

Workaround(s) & Mitigation(s):

None

References:

• Complete CVSS v3 Guide
• On-line Calculator v3

Related Information:
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Acknowledgement

None

Change History
06 July 2016: Original Copy 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.