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.

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.

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.

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.

The remote Ubuntu 18.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-4563-1 advisory.

    It was discovered that the fix for CVE-2018-7182 introduced a NULL pointer dereference into NTP. An     attacker could use this vulnerability to cause a denial of service (crash).

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

The remote Ubuntu 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-4563-2 advisory.

    USN-4563-1 fixed a vulnerability in NTP. This update provides the corresponding update for Ubuntu 20.04     LTS and Ubuntu 20.10.



Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
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
127006	EulerOS 2.0 SP8 : ntp (EulerOS-SA-2019-1769)	Nessus	Huawei Local Security Checks	2019/7/25	2024/5/8	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
123449	SUSE SLES12 Security Update : ntp (SUSE-SU-2019:0775-1)	Nessus	SuSE Local Security Checks	2019/3/28	2024/6/7	high
141110	Ubuntu 18.04 LTS : NTP vulnerability (USN-4563-1)	Nessus	Ubuntu Local Security Checks	2020/10/2	2024/8/29	high
148842	Ubuntu 20.04 LTS : NTP vulnerability (USN-4563-2)	Nessus	Ubuntu Local Security Checks	2021/4/20	2024/10/29	high

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