Security Bulletin: Several vulnerabilities in the libpng component of IBM Cognos Business Intelligence Server (CVE-2015-8126, CVE-2015-8472, CVE-2015-8540)

Security Bulletin

Summary

Several vulnerabilities has been addressed in the libpng component of IBM Cognos Business Intelligence Server.

Vulnerability Details

CVEID: CVE-2015-8126
DESCRIPTION: libpng is vulnerable to a buffer overflow, caused by improper bounds checking by the png_set_PLTE() and png_get_PLTE() functions. By persuading a victim to open a specially-crafted PNG file, a remote attacker could overflow a buffer and execute arbitrary code on the system.
CVSS Base Score: 7.800
CVSS Temporal Score: https://exchange.xforce.ibmcloud.com/vulnerabilities/108010 for more information
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)

CVEID: CVE-2015-8472
DESCRIPTION: libpng is vulnerable to a buffer overflow, caused by improper bounds checking by the png_get_PLTE() and png_set_PLTE() functions. By persuading a victim to open a specially crafted PNG image, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
CVSS Base Score: 6.300
CVSS Temporal Score: https://exchange.xforce.ibmcloud.com/vulnerabilities/109392 for more information
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-2015-8540
DESCRIPTION: libpng is vulnerable to a buffer overflow, caused by a read underflow in png_check_keyword in pngwutil.c. By sending an overly long argument, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
CVSS Base Score: 9.800
CVSS Temporal Score: https://exchange.xforce.ibmcloud.com/vulnerabilities/109219 for more information
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

IBM Cognos Business Intelligence Server 10.2.2
IBM Cognos Business Intelligence Server 10.2.1.1
IBM Cognos Business Intelligence Server 10.2.1
IBM Cognos Business Intelligence Server 10.2
IBM Cognos Business Intelligence Server 10.1.1
IBM Cognos Business Intelligence Server 10.1

Remediation/Fixes

The recommended solution is to apply the fix for versions listed as soon as practical.

10.1.x: http://www-01.ibm.com/support/docview.wss?uid=swg24041799
10.2.x: http://www-01.ibm.com/support/docview.wss?uid=swg24041800

Workarounds and Mitigations

None known. Apply fixes.

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Important Note

IBM strongly suggests that all System z customers be subscribed to the System z Security Portal to receive the latest critical System z security and integrity service. If you are not subscribed, see the instructions on the System z Security web site. Security and integrity APARs and associated fixes will be posted to this portal. IBM suggests reviewing the CVSS scores and applying all security or integrity fixes as soon as possible to minimize any potential risk.

References

Complete CVSS v2 Guide
On-line Calculator v2

Complete CVSS v3 Guide
On-line Calculator v3

Off

*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: Several vulnerabilities in the libpng component of IBM Cognos Business Intelligence Server (CVE-2015-8126, CVE-2015-8472, CVE-2015-8540)