Issued:

2018-04-10

Updated:

2018-04-10

RHSA-2018:0855 - Moderate: ntp security, bug fix, and enhancement update

Synopsis

Moderate: ntp security, bug fix, and enhancement update

Type/Severity

Security Advisory Moderate

Topic

An update for ntp is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The Network Time Protocol (NTP) is used to synchronize a computer's time with another referenced time source. These packages include the ntpd service which continuously adjusts system time and utilities used to query and configure the ntpd service.

Security Fix(es):

• ntp: Authenticated DoS via Malicious Config Option (CVE-2017-6463)

• ntp: Denial of Service via Malformed Config (CVE-2017-6464)

• ntp: Buffer Overflow in DPTS Clock (CVE-2017-6462)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Red Hat would like to thank the NTP project for reporting these issues. Upstream acknowledges Cure53 as the original reporter of these issues.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.5 Release Notes linked from the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing this update, the ntpd daemon will restart automatically.

Affected Products

Updated Packages

• ntpdate-4.2.6p5-28.el7.aarch64.rpm
• ntp-4.2.6p5-28.el7.x86_64.rpm
• ntpdate-4.2.6p5-28.el7.s390x.rpm
• ntp-4.2.6p5-28.el7.aarch64.rpm
• ntp-debuginfo-4.2.6p5-28.el7.ppc64le.rpm
• ntp-4.2.6p5-28.el7.ppc64le.rpm
• ntp-perl-4.2.6p5-28.el7.noarch.rpm
• ntp-debuginfo-4.2.6p5-28.el7.ppc64.rpm
• ntpdate-4.2.6p5-28.el7.ppc64.rpm
• ntp-debuginfo-4.2.6p5-28.el7.x86_64.rpm
• ntp-4.2.6p5-28.el7.s390x.rpm
• ntp-doc-4.2.6p5-28.el7.noarch.rpm
• sntp-4.2.6p5-28.el7.aarch64.rpm
• ntpdate-4.2.6p5-28.el7.ppc64le.rpm
• sntp-4.2.6p5-28.el7.ppc64le.rpm
• sntp-4.2.6p5-28.el7.x86_64.rpm
• ntp-debuginfo-4.2.6p5-28.el7.aarch64.rpm
• ntp-4.2.6p5-28.el7.src.rpm
• ntpdate-4.2.6p5-28.el7.x86_64.rpm
• ntp-debuginfo-4.2.6p5-28.el7.s390x.rpm
• ntp-4.2.6p5-28.el7.ppc64.rpm
• sntp-4.2.6p5-28.el7.ppc64.rpm
• sntp-4.2.6p5-28.el7.s390x.rpm

Fixes

• This content is not included.BZ - 1420453
• This content is not included.BZ - 1433987
• This content is not included.BZ - 1433995
• This content is not included.BZ - 1434002
• This content is not included.BZ - 1442083
• This content is not included.BZ - 1466947
• This content is not included.BZ - 1491797
• This content is not included.BZ - 1493452

CVEs

• CVE-2017-6462
• CVE-2017-6463
• CVE-2017-6464

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-US/red_hat_enterprise_linux/7/html/7.5_release_notes/index.html

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.