SUSE Security Update: Security update for dhcp
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Announcement ID:    SUSE-SU-2021:14740-1
Rating:             important
References:         #1186382 
Cross-References:   CVE-2021-25217
CVSS scores:
                    CVE-2021-25217 (SUSE): 7.4 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Affected Products:
                    SUSE Linux Enterprise Server 11-SP4-LTSS
                    SUSE Linux Enterprise Point of Sale 11-SP3
                    SUSE Linux Enterprise Debuginfo 11-SP4
                    SUSE Linux Enterprise Debuginfo 11-SP3
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   An update that fixes one vulnerability is now available.

Description:

   This update for dhcp fixes the following issues:

   - CVE-2021-25217: A buffer overrun in lease file parsing code can be used
     to exploit a common vulnerability shared by dhcpd and dhclient
     (bsc#1186382)


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-dhcp-14740=1

   - SUSE Linux Enterprise Point of Sale 11-SP3:

      zypper in -t patch sleposp3-dhcp-14740=1

   - SUSE Linux Enterprise Debuginfo 11-SP4:

      zypper in -t patch dbgsp4-dhcp-14740=1

   - SUSE Linux Enterprise Debuginfo 11-SP3:

      zypper in -t patch dbgsp3-dhcp-14740=1



Package List:

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

      dhcp-4.2.4.P2-0.28.12.1
      dhcp-client-4.2.4.P2-0.28.12.1
      dhcp-relay-4.2.4.P2-0.28.12.1
      dhcp-server-4.2.4.P2-0.28.12.1

   - SUSE Linux Enterprise Point of Sale 11-SP3 (i586):

      dhcp-4.2.4.P2-0.28.12.1
      dhcp-client-4.2.4.P2-0.28.12.1
      dhcp-relay-4.2.4.P2-0.28.12.1
      dhcp-server-4.2.4.P2-0.28.12.1

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

      dhcp-debuginfo-4.2.4.P2-0.28.12.1
      dhcp-debugsource-4.2.4.P2-0.28.12.1

   - SUSE Linux Enterprise Debuginfo 11-SP3 (i586 s390x x86_64):

      dhcp-debuginfo-4.2.4.P2-0.28.12.1
      dhcp-debugsource-4.2.4.P2-0.28.12.1


References:

   https://www.suse.com/security/cve/CVE-2021-25217.html
   https://bugzilla.suse.com/1186382