Security update for dnsmasq

SUSE Security Update: Security update for dnsmasq
Announcement ID: SUSE-SU-2021:14603-1
Rating: important
References: #1154849 #1176076 #1177077
Cross-References:CVE-2019-14834 CVE-2020-25681 CVE-2020-25682 CVE-2020-25683 CVE-2020-25684 CVE-2020-25685 CVE-2020-25686 CVE-2020-25687
Affected Products:
  • SUSE Linux Enterprise Server 11-SP4-LTSS
  • SUSE Linux Enterprise Debuginfo 11-SP4

An update that fixes 8 vulnerabilities is now available.


This update for dnsmasq fixes the following issues:

  • CVE-2019-14834: Fixed a memory leak which could have allowed to remote attackers to cause denial of service via DHCP response creation (bsc#1154849)
  • bsc#1177077: Fixed DNSpooq vulnerabilities
  • CVE-2020-25684, CVE-2020-25685, CVE-2020-25686: Fixed multiple Cache poisoning attacks.
  • CVE-2020-25681, CVE-2020-25682, CVE-2020-25683, CVE-2020-25687: Fixed multiple potential Heap-based overflows when DNSSEC is enabled.
  • Retry query to other servers on receipt of SERVFAIL rcode (bsc#1176076)

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-dnsmasq-14603=1
  • SUSE Linux Enterprise Debuginfo 11-SP4:
    zypper in -t patch dbgsp4-dnsmasq-14603=1

Package List:

  • SUSE Linux Enterprise Server 11-SP4-LTSS (i586 ppc64 s390x x86_64):
    • dnsmasq-2.78-
  • SUSE Linux Enterprise Debuginfo 11-SP4 (i586 ppc64 s390x x86_64):
    • dnsmasq-debuginfo-2.78-
    • dnsmasq-debugsource-2.78-