Security Bulletin: Multiple vulnerabilities in curl affect IBM Flex System Manager (FSM)

Summary

Multiple vulnerabilities have been discovered in curl that is embedded in FSM. This bulletin addresses these issues.

Vulnerability Details

CVEID: CVE-2016-8615**
DESCRIPTION:** cURL/libcurl is vulnerable to cookie injection, caused by an error related to fgets() function. By using a malicious server that sends a very long cookie name and value, a remote attacker could exploit this vulnerability to inject a malicious cookie for arbitrary domains.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/118632 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-2016-8616**
DESCRIPTION:** cURL/libcurl could allow a remote attacker to bypass security restrictions, caused by the use of case insensitive comparisons. By using valid credentials exists for a protocol which supports connection-scoped credentials, an attacker could exploit this vulnerability to cause a connection to be reused.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/118633 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-2016-8617**
DESCRIPTION:** cURL/libcurl could allow a remote authenticated attacker to execute arbitrary code on the system, caused by an out of bounds write in the base64 encode function. By using a specially crafted username, an attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base Score: 5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/118636 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L)

CVEID: CVE-2016-8618**
DESCRIPTION:** cURL/libcurl could allow a remote attacker to execute arbitrary code on the system, caused by double-free error in the curl_maprintf() function on systems using 32 bit size_t variables. An attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base Score: 7.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/118645 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID: CVE-2016-8621**
DESCRIPTION:** cURL/libcurl could allow a remote attacker to obtain sensitive information, caused by an out of bounds read error within the curl_getdate function. By using specially-crafted date strings, a remote attacker could exploit this vulnerability to execute arbitrary code in the context of the process and obtain sensitive information.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/118639 for the 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:N)

CVEID: CVE-2016-8624**
DESCRIPTION:** cURL/libcurl could allow a remote attacker to bypass security restrictions, caused by the failure to parse the authority component of the URL when handling ‘#’ character. By using a specially-crafted URL with ‘#’ character, an attacker could exploit this vulnerability to bypass access restrictions.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/118642 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)

Affected Products and Versions

Flex System Manager 1.3.4.0
Flex System Manager 1.3.3.0
Flex System Manager 1.3.2.1
Flex System Manager 1.3.2.0

Remediation/Fixes

IBM recommends updating the FSM and all affected remote Common Agent Services (CAS) endpoints using the instructions referenced in this table.

For all other releases IBM recommends upgrading to a fixed, supported version/release of the product.

You should verify applying this fix does not cause any compatibility issues. The fix may disable older encrypted protocols by default.

IBM recommends that you review your entire environment to identify other areas where you have enabled weak encryption and take appropriate mitigation and remediation actions.

For a complete listing of FSM security iFixes go to this technote: http://www-01.ibm.com/support/docview.wss?uid=nas7797054ebc3d9857486258027006ce4a0&myns=purflex&mync=E&cm_sp=purflex--NULL--E

Workarounds and Mitigations

None