Low: krb5

Issue Overview:

MIT krb5 1.6 or later allows an authenticated kadmin with permission to add principals to an LDAP Kerberos database to circumvent a DN containership check by supplying both a “linkdn” and “containerdn” database argument, or by supplying a DN string which is a left extension of a container DN string but is not hierarchically within the container DN. (CVE-2018-5730)

MIT krb5 1.6 or later allows an authenticated kadmin with permission to add principals to an LDAP Kerberos database to cause a denial of service (NULL pointer dereference) or bypass a DN container check by supplying tagged data that is internal to the database module. (CVE-2018-5729)

Affected Packages:

krb5

Issue Correction:
Run yum update krb5 to update your system.

New Packages:

i686:  
    krb5-devel-1.15.1-34.44.amzn1.i686  
    krb5-workstation-1.15.1-34.44.amzn1.i686  
    krb5-pkinit-openssl-1.15.1-34.44.amzn1.i686  
    krb5-server-1.15.1-34.44.amzn1.i686  
    krb5-server-ldap-1.15.1-34.44.amzn1.i686  
    libkadm5-1.15.1-34.44.amzn1.i686  
    krb5-libs-1.15.1-34.44.amzn1.i686  
    krb5-debuginfo-1.15.1-34.44.amzn1.i686  
  
src:  
    krb5-1.15.1-34.44.amzn1.src  
  
x86_64:  
    krb5-server-ldap-1.15.1-34.44.amzn1.x86_64  
    krb5-devel-1.15.1-34.44.amzn1.x86_64  
    krb5-debuginfo-1.15.1-34.44.amzn1.x86_64  
    krb5-workstation-1.15.1-34.44.amzn1.x86_64  
    libkadm5-1.15.1-34.44.amzn1.x86_64  
    krb5-libs-1.15.1-34.44.amzn1.x86_64  
    krb5-server-1.15.1-34.44.amzn1.x86_64  
    krb5-pkinit-openssl-1.15.1-34.44.amzn1.x86_64  

Additional References

Red Hat: CVE-2018-5729, CVE-2018-5730

Mitre: CVE-2018-5729, CVE-2018-5730