SUSE Security Update: Security update for ntp
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Announcement ID:    SUSE-SU-2020:1823-1
Rating:             moderate
References:         #1125401 #1169740 #1171355 #1172651 #1173334 
                    #992038 
Cross-References:   CVE-2018-8956 CVE-2020-11868 CVE-2020-13817
                    CVE-2020-15025
Affected Products:
                    SUSE Linux Enterprise Server for SAP 15
                    SUSE Linux Enterprise Server 15-LTSS
                    SUSE Linux Enterprise Module for Legacy Software 15-SP2
                    SUSE Linux Enterprise Module for Legacy Software 15-SP1
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   An update that solves four vulnerabilities and has two
   fixes is now available.

Description:

   This update for ntp fixes the following issues:

   ntp was updated to 4.2.8p15

   - CVE-2020-11868: Fixed an issue which a server mode packet with spoofed
     source address frequently send to the client ntpd could have caused
     denial of service (bsc#1169740).
   - CVE-2018-8956: Fixed an issue which could have allowed remote attackers     to prevent a broadcast client from synchronizing its clock with a
     broadcast NTP server via spoofed mode 3 and mode 5 packets (bsc#1171355).
   - CVE-2020-13817: Fixed an issue which an off-path attacker with the
     ability to query time from victim's ntpd instance could have modified
     the victim's clock by a limited amount (bsc#1172651).
   - CVE-2020-15025: Fixed an issue which remote attacker could have caused
     denial of service by consuming the memory when a CMAC key was used
     andassociated with a CMAC algorithm in the ntp.keys (bsc#1173334).
   - Removed an OpenSSL version warning (bsc#992038 and bsc#1125401).


Patch Instructions:

   To install this SUSE Security Update use the SUSE recommended installation methods
   like YaST online_update or "zypper patch".

   Alternatively you can run the command listed for your product:

   - SUSE Linux Enterprise Server for SAP 15:

      zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-2020-1823=1

   - SUSE Linux Enterprise Server 15-LTSS:

      zypper in -t patch SUSE-SLE-Product-SLES-15-2020-1823=1

   - SUSE Linux Enterprise Module for Legacy Software 15-SP2:

      zypper in -t patch SUSE-SLE-Module-Legacy-15-SP2-2020-1823=1

   - SUSE Linux Enterprise Module for Legacy Software 15-SP1:

      zypper in -t patch SUSE-SLE-Module-Legacy-15-SP1-2020-1823=1



Package List:

   - SUSE Linux Enterprise Server for SAP 15 (ppc64le x86_64):

      ntp-4.2.8p15-4.10.1
      ntp-debuginfo-4.2.8p15-4.10.1
      ntp-debugsource-4.2.8p15-4.10.1

   - SUSE Linux Enterprise Server 15-LTSS (aarch64 s390x):

      ntp-4.2.8p15-4.10.1
      ntp-debuginfo-4.2.8p15-4.10.1
      ntp-debugsource-4.2.8p15-4.10.1

   - SUSE Linux Enterprise Module for Legacy Software 15-SP2 (aarch64 ppc64le s390x x86_64):

      ntp-4.2.8p15-4.10.1
      ntp-debuginfo-4.2.8p15-4.10.1
      ntp-debugsource-4.2.8p15-4.10.1

   - SUSE Linux Enterprise Module for Legacy Software 15-SP1 (aarch64 ppc64le s390x x86_64):

      ntp-4.2.8p15-4.10.1
      ntp-debuginfo-4.2.8p15-4.10.1
      ntp-debugsource-4.2.8p15-4.10.1


References:

   https://www.suse.com/security/cve/CVE-2018-8956.html
   https://www.suse.com/security/cve/CVE-2020-11868.html
   https://www.suse.com/security/cve/CVE-2020-13817.html
   https://www.suse.com/security/cve/CVE-2020-15025.html
   https://bugzilla.suse.com/1125401
   https://bugzilla.suse.com/1169740
   https://bugzilla.suse.com/1171355
   https://bugzilla.suse.com/1172651
   https://bugzilla.suse.com/1173334
   https://bugzilla.suse.com/992038

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