SUSE Security Update: Security update for ntp
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Announcement ID:    SUSE-SU-2020:14415-1
Rating:             moderate
References:         #1169740 #1171355 #1172651 #1173334 
Cross-References:   CVE-2018-8956 CVE-2020-11868 CVE-2020-13817
                    CVE-2020-15025
Affected Products:
                    SUSE Linux Enterprise Server 11-SP4-LTSS
                    SUSE Linux Enterprise Debuginfo 11-SP4
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   An update that fixes four vulnerabilities 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).


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 11-SP4-LTSS:

      zypper in -t patch slessp4-ntp-14415=1

   - SUSE Linux Enterprise Debuginfo 11-SP4:

      zypper in -t patch dbgsp4-ntp-14415=1



Package List:

   - SUSE Linux Enterprise Server 11-SP4-LTSS (i586 ppc64 s390x x86_64):

      ntp-4.2.8p15-64.16.1
      ntp-doc-4.2.8p15-64.16.1

   - SUSE Linux Enterprise Debuginfo 11-SP4 (i586 ppc64 s390x x86_64):

      ntp-debuginfo-4.2.8p15-64.16.1
      ntp-debugsource-4.2.8p15-64.16.1


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/1169740
   https://bugzilla.suse.com/1171355
   https://bugzilla.suse.com/1172651
   https://bugzilla.suse.com/1173334

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