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

Summary

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

Vulnerability Details

CVEID: CVE-2015-5219**
DESCRIPTION:** Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in the sntp program. By sending specially crafted NTP packets, a remote attacker from within the local network could exploit this vulnerability to cause the application to enter into an infinite loop.
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/107597 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2015-8139**
DESCRIPTION:** NTP could allow a remote attacker to obtain sensitive information, caused by an origin leak in ntpq and ntpdc. An attacker could exploit this vulnerability to obtain sensitive information.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/110027 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-2015-8140**
DESCRIPTION:** NTP could allow a remote attacker to launch a replay attack. An attacker could exploit this vulnerability using ntpq to conduct a replay attack and gain unauthorized access to the system.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/110028 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-2016-7426**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by the improper handling of invalid server responses. By sending specially crafted packets with spoofed source address, a remote attacker could exploit this vulnerability to a denial of service.
CVSS Base Score: 1.6
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/119094 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:P/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-7427**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by an error in broadcast mode replay prevention functionality. By sending specially crafted NTP packets, a local attacker could exploit this vulnerability to cause a denial of service.
CVSS Base Score: 4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/119088 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-7428**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by an error in broadcast mode poll interval enforcement functionality. By sending specially crafted NTP packets, a remote attacker from within the local network could exploit this vulnerability to cause a denial of service.
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/119089 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-7429**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by an attack on interface selection. By sending specially crafted packets with spoofed source address, a physical attacker could exploit this vulnerability to cause a denial of service.
CVSS Base Score: 1.6
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/119093 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:P/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-7431**
DESCRIPTION:** NTP could allow a remote attacker to bypass security restrictions, caused by the improper handling of Zero origin timestamp checks. An attacker could exploit this vulnerability to launch further attacks on the system.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/119091 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-2016-7433**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by the inclusion of the root delay allowing for an incorrect root distance calculation. An attacker could exploit this vulnerability to cause a denial of service.
CVSS Base Score: 1.6
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/119095 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:P/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-7434**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by a NULL pointer dereference in the _IO_str_init_static_internal() function. By sending specially crafted mrulist query packets, a physical attacker could exploit this vulnerability to cause the application to crash.
CVSS Base Score: 3.8
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/119092 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:P/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H)

CVEID: CVE-2016-9310**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by an error in the control mode (mode 6) functionality. By sending specially crafted control mode packets, a remote attacker could exploit this vulnerability to obtain sensitive information and cause the application to crash.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/119087 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:L)

CVEID: CVE-2016-9311**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by a NULL pointer dereference when trap service has been enabled. By sending specially crafted packets, a remote attacker could exploit this vulnerability to cause the application to crash.
CVSS Base Score: 4.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/119086 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H)

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