Security Bulletin: IBM Flex System Manager (FSM) is affected by multiple ntp vulnerabilities

Summary

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

Vulnerability Details

CVEID: CVE-2015-7705**
DESCRIPTION:** Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in the rate-limiting mechanism. By “priming the pump” and sending a valid Kiss-o’-Death packet, an attacker could exploit this vulnerability to disable NTP at a victim client and prevent the client from updating its local clock.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/107447 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)

CVEID: CVE-2015-7973**
DESCRIPTION:** NTP could allow a remote attacker to launch a replay attack. An attacker could exploit this vulnerability using authenticated broadcast mode packets to conduct a replay attack and gain unauthorized access to the system.
CVSS Base Score: 5.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/110018 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:L/A:L)

CVEID: CVE-2015-7974**
DESCRIPTION:** NTP could allow a remote authenticated attacker to conduct spoofing attacks, caused by a missing key check. An attacker could exploit this vulnerability to impersonate a peer.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/110019 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N)

CVEID: CVE-2015-7975**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by improper bounds checking by the nextvar() function in ntpq. By sending specially crafted data, an attacker could exploit this vulnerability to cause the service to crash.
CVSS Base Score: 4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/110020 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-2015-7976**
DESCRIPTION:** NTP could allow a remote authenticated attacker to bypass security restrictions, caused by the failure to filter special characters from the supplied filename by the ntpq saveconfig command. An attacker could exploit this vulnerability to allow dangerous characters in filenames.
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/110021 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N)

CVEID: CVE-2015-7977**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by a NULL pointer dereference. By sending a specially crafted ntpdc reslist command, an attacker could exploit this vulnerability to cause a segmentation fault.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/110022 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:L)

CVEID: CVE-2015-7978**
DESCRIPTION:** NTP is vulnerable to a denial of service. By sending a specially crafted reslist command, an attacker could exploit this vulnerability to consume all available stack memory.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/110023 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:L)

CVEID: CVE-2015-7979**
DESCRIPTION:** NTP could allow a remote attacker to bypass security restrictions. By sending specially crafted broadcast packets with bad authentication, an attacker could exploit this vulnerability to cause the target broadcast client to tear down the association with the broadcast server.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/110024 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:L)

CVEID: CVE-2015-8138**
DESCRIPTION:** NTP could allow a remote attacker to bypass security restrictions. By sending a specially crafted packet with an origin timestamp of zero, an attacker could exploit this vulnerability to bypass the timestamp validation check.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/110025 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-2015-8139**
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-2015-5300**
DESCRIPTION:** Network Time Protocol (NTP) could allow a remote attacker to bypass security restrictions, caused by the failure to correctly implement the threshold limitation for the ‘-g’ option. An attacker could exploit this vulnerability using man-in-the-middle techniques to intercept NTP traffic and make multiple steps larger than the panic threshold.
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/107594 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N)

CVEID: CVE-2015-7704**
DESCRIPTION:** Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in the rate-limiting mechanism. By sending spoofed Kiss-o’-Death packets, an attacker could exploit this vulnerability to disable NTP at a victim client.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/107446 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)

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-2015-8158**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by the improper processing of incoming packets by ntpq. By sending specially crafted data, an attacker could exploit this vulnerability to cause the application to enter into an infinite loop.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/110026 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:L)

CVEID: CVE-2016-1547**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by the demobilization of a preemptable client association. By sending specially crafted crypto NAK packets, an attacker could exploit this vulnerability to cause a denial of service.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112739 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-1548**
DESCRIPTION:** NTP could allow a remote attacker to bypass security restrictions, caused by an error in the ntpd client. By changing the client from basic client/server mode to interleaved symmetric mode, an attacker could exploit this vulnerability to modify the time of the client or cause a denial of service.
CVSS Base Score: 7.2
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112740 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L)

CVEID: CVE-2016-1549**
DESCRIPTION:** NTP could allow a remote authenticated attacker to bypass security restrictions, caused by the failure to prevent Sybil attacks from authenticated peers. By creating multiple ephemeral associations to win the clock selection of ntpd, an attacker could exploit this vulnerability to modify a victim’s clock.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112741 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N)

CVEID: CVE-2016-1550**
DESCRIPTION:** NTP could allow a local attacker to bypass security restrictions, caused by the failure to use a constant-time memory comparison function when validating the authentication digest on incoming packets. By sending a specially crafted packet with an authentication payload, an attacker could exploit this vulnerability to conduct a timing attack to compute the value of the valid authentication digest.
CVSS Base Score: 4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112742 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N)

CVEID: CVE-2016-1551**
DESCRIPTION:** NTP could allow a remote authenticated attacker to bypass security restrictions, caused by the failure to filter IPv4 bogon packets received from the network. If ntpd is configured to use a reference clock, an attacker could exploit this vulnerability to spoof refclock packets to ntpd processes.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112743 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N)

CVEID: CVE-2016-2516**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by the improper validation of input. By creating a session with duplicate IPs on unconfig directives, an attacker could exploit this vulnerability to cause an assertion failure.
CVSS Base Score: 4.2
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112744 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H)

CVEID: CVE-2016-2518**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by an error when using a specially crafted packet to create a peer association with hmode > 7. An attacker could exploit this vulnerability to cause the MATCH_ASSOC() function to trigger an out-of-bounds read.
CVSS Base Score: 2
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112746 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-2517**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by the improper validation of remote configuration trustedkey/requestkey/controlkey values. By creating a session with duplicate IPs on unconfig directives, an attacker could exploit this vulnerability to cause an assertion botch in ntpd.
CVSS Base Score: 4.2
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112745 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H)

CVEID: CVE-2016-2519**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by the failure to always check the ctl_getitem() function return value. By sending an overly large value, an attacker could exploit this vulnerability to cause a denial of service.
CVSS Base Score: 4.2
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112747 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H)

CVEID: CVE-2016-4953**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by the improper handling of packets. By sending specially crafted CRYPTO_NAK packets to an ephemeral peer target prior to a response being sent, a remote attacker could exploit this vulnerability to demobilize the ephemeral association.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/113696 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-4954**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by the improper handling of packets. By sending spoofed server packets with correct origin timestamps, a remote attacker could exploit this vulnerability to cause a false leap indication to be set.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/113697 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-4955**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by the improper handling of packets. By sending spoofed CRYPTO_NAK or a bad MAC packets with correct origin timestamps, a remote attacker could exploit this vulnerability to cause the autokey association to reset.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/113698 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-4956**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by the failure to cover broadcast associations. A remote attacker could exploit this vulnerability to cause broadcast clients to flip into interleave mode.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/113699 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-4957**
DESCRIPTION:** NTP is vulnerable to a denial of service, caused by the improper handling of packets. By sending specially crafted CRYPTO_NAK packets, an attacker could exploit this vulnerability to cause ntpd to crash.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/113695 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

Remediation/Fixes

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

Product |

VRMF |

APAR |

Remediation
—|—|—|—
Flex System Manager|

1.3.4.x |

IT16216

| Install fsmfix1.3.4.0_IT16216_IT16217_IT16218_IT16219
Flex System Manager|

1.3.3.x |

IT16216

| Install fsmfix1.3.3.0_IT16216_IT16217_IT16218_IT16219
Flex System Manager|

1.3.2.x |

IT16216

| Install fsmfix1.3.2.0_IT16216_IT16217_IT16218_IT16219

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

None