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Security Bulletin: IBM Flex System Manager (FSM) is affected by multiple perl vulnerabilities (CVE-2016-1238, CVE-2016-2381, CVE-2015-8853)

Security Bulletin


Multiple vulnerabilities have been identified in perl that is embedded in the IBM FSM. This fix addresses these vulnerabilities.

Vulnerability Details

CVEID: CVE-2016-1238
Perl could allow a local attacker to gain elevated privileges on the system, caused by an error when loading optional modules. By loading code from the current working directory, an attacker could exploit this vulnerability to cause the target Perl application to load and execute arbitrary code on the target system with elevated privileges.
CVSS Base Score: 8.4
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID: CVE-2016-2381
Perl could allow a remote attacker to bypass security restrictions, caused by improper handling of $ENV{"X"} variable. By using duplicate environment variables in envp, an attacker could exploit this vulnerability to bypass the taint protection mechanism.
CVSS Base Score: 5.3
CVSS Temporal Score: See 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:L/A:N)

CVEID: CVE-2015-8853
Perl is vulnerable to a denial of service, caused by the improper handling of illegal inputs. An attacker could exploit this vulnerability using regular expression on malformed UTF8 input to cause the application to enter into an infinite loop and consume all available CPU resources.
CVSS Base Score: 7.5
CVSS Temporal Score: See 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:H)

Affected Products and Versions

Flex System Manager 1.3.4.x
Flex System Manager 1.3.3.x
Flex System Manager 1.3.2.x


IBM recommends updating the FSM using the instructions referenced in this table.

Flex System Manager
Install fsmfix1.3.4.0_IT17534_IT17536_IT17537_IT17653
Flex System Manager
Install fsmfix1.3.3.0_IT17534_IT17536_IT17537_IT17653
Flex System Manager
Install fsmfix1.3.2.0_IT17534_IT17536_IT17537_IT17653

For a complete list of FSM security bulletins refer to this technote:

For 1.1.x.x, 1.2.x.x, 1.3.0.x and 1.3.1.x IBM recommends upgrading to a fixed, supported version/release of the product.

Workarounds and Mitigations


Get Notified about Future Security Bulletins



Change History

14 November 2016: Original version published
22 November 2016: Corrected CVE number in the Bulletin title

*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.


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.

Internal Use Only

Advisory 6600, PSIRT 83972

[{"Product":{"code":"HW94A","label":"Flex System Manager Node"},"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Component":"--","Platform":[{"code":"PF016","label":"Linux"}],"Version":"Version Independent","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
17 June 2018