The CentOS Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare CENTOS6:CLSA-2026:1777453146 advisory.

  - The protocol engine in ntp 4.2.6 before 4.2.8p11 allows a remote attackers to cause a denial of service     (disruption) by continually sending a packet with a zero-origin timestamp and source IP address of the     other side of an interleaved association causing the victim ntpd to reset its association.
    (CVE-2018-7185)

  - NTP through 4.2.8p12 has a NULL Pointer Dereference. (CVE-2019-8936)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

This update for ntp fixes the following issues :

Security issue fixed :

CVE-2019-8936: Fixed a NULL pointer exception which could allow an authenticated attcker to cause segmentation fault to ntpd (bsc#1128525).

Other issues addressed: Fixed several bugs in the BANCOMM reclock driver.

Fixed ntp_loopfilter.c snprintf compilation warnings.

Fixed spurious initgroups() error message.

Fixed STA_NANO struct timex units.

Fixed GPS week rollover in libparse.

Fixed incorrect poll interval in packet.

Added a missing check for ENABLE_CMAC.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for ntp fixes the following issues :

Security issue fixed: &#9; 

  - CVE-2019-8936: Fixed a NULL pointer exception which     could allow an authenticated attcker to cause     segmentation fault to ntpd (bsc#1128525).

Other issues addressed :

  - Fixed several bugs in the BANCOMM reclock driver.

  - Fixed ntp_loopfilter.c snprintf compilation warnings.

  - Fixed spurious initgroups() error message.

  - Fixed STA_NANO struct timex units.

  - Fixed GPS week rollover in libparse.

  - Fixed incorrect poll interval in packet.

  - Added a missing check for ENABLE_CMAC.

This update was imported from the SUSE:SLE-15:Update update project.

According to the version of the ntp packages installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - NTP through 4.2.8p12 has a NULL Pointer     Dereference.(CVE-2019-8936)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Network Time Foundation reports :

A crafted malicious authenticated mode 6 (ntpq) packet from a permitted network address can trigger a NULL pointer dereference, crashing ntpd.

Note that for this attack to work, the sending system must be on an address that the target's ntpd accepts mode 6 packets from, and must use a private key that is specifically listed as being used for mode 6 authorization.

Impact: The ntpd daemon can crash due to the NULL pointer dereference, causing a denial of service.

Mitigation :

- Use restrict noquery to limit addresses that can send mode 6 queries.

- Limit access to the private controlkey in ntp.keys.

- Upgrade to 4.2.8p13, or later.

This update for ntp fixes the following issues :

Security issue fixed :

CVE-2019-8936: Fixed a NULL pointer exception which could allow an authenticated attcker to cause segmentation fault to ntpd (bsc#1128525).

Other issues addressed: Make sure that SLE12 version is higher than the one in SLE11 (bsc#1001182).

Fixed several bugs in the BANCOMM reclock driver.

Fixed ntp_loopfilter.c snprintf compilation warnings.

Fixed spurious initgroups() error message.

Fixed STA_NANO struct timex units.

Fixed GPS week rollover in libparse.

Fixed incorrect poll interval in packet.

Added a missing check for ENABLE_CMAC.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for ntp fixes the following issues :

Security issue fixed :

CVE-2019-8936: Fixed a NULL pointer exception which could allow an authenticated attcker to cause segmentation fault to ntpd (bsc#1128525).

Other isses addressed: Fixed an issue which caused openSSL mismatch (bsc#1125401)

Fixed several bugs in the BANCOMM reclock driver.

Fixed ntp_loopfilter.c snprintf compilation warnings.

Fixed spurious initgroups() error message.

Fixed STA_NANO struct timex units.

Fixed GPS week rollover in libparse.

Fixed incorrect poll interval in packet.

Added a missing check for ENABLE_CMAC.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	名前	製品	ファミリー	公開日	更新日	深刻度
351983	CentOS Linux 6 [TuxCare] Security Update: ntp / ntp-doc / ntp-perl / ntpdate Multiple Vulnerabilities (CENTOS6:CLSA-2026:1777453146)	Nessus	CentOS Local Security Checks	2026/9/30	2026/9/30	high
123451	SUSE SLED15 / SLES15 Security Update : ntp (SUSE-SU-2019:0777-1)	Nessus	SuSE Local Security Checks	2019/3/28	2024/6/7	high
123773	openSUSE Security Update : ntp (openSUSE-2019-1143)	Nessus	SuSE Local Security Checks	2019/4/5	2024/6/5	high
127006	EulerOS 2.0 SP8 : ntp (EulerOS-SA-2019-1769)	Nessus	Huawei Local Security Checks	2019/7/25	2024/5/8	high
122685	FreeBSD : ntp -- Crafted null dereference attack from a trusted source with an authenticated mode 6 packet (c2576e14-36e2-11e9-9eda-206a8a720317)	Nessus	FreeBSD Local Security Checks	2019/3/8	2024/6/14	high
123454	SUSE SLES11 Security Update : ntp (SUSE-SU-2019:13991-1)	Nessus	SuSE Local Security Checks	2019/3/28	2024/6/7	high
123500	SUSE SLED12 / SLES12 Security Update : ntp (SUSE-SU-2019:0789-1)	Nessus	SuSE Local Security Checks	2019/3/29	2024/6/7	high

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