-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Moderate: krb5 security update Advisory ID: RHSA-2021:1593-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:1593 Issue date: 2021-05-18 CVE Names: CVE-2020-28196 ==================================================================== 1. Summary: An update for krb5 is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, ppc64le, s390x, x86_64 3. Description: Kerberos is a network authentication system, which can improve the security of your network by eliminating the insecure practice of sending passwords over the network in unencrypted form. It allows clients and servers to authenticate to each other with the help of a trusted third party, the Kerberos key distribution center (KDC). Security Fix(es): * krb5: unbounded recursion via an ASN.1-encoded Kerberos message in lib/krb5/asn.1/asn1_encode.c may lead to DoS (CVE-2020-28196) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.4 Release Notes linked from the References section. 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, running Kerberos services (krb5kdc, kadmin, and kprop) will be restarted automatically. 5. Bugs fixed (https://bugzilla.redhat.com/): 1835713 - krb5: typo error(s) in man page(s) 1868039 - krb5 spec file - wrong url in source0 and source1 1869055 - [doc] kvno usage not compliant with man page kvno(1) 1872689 - Radius Authentication does not work in FIPS mode 1901041 - CVE-2020-28196 krb5: unbounded recursion via an ASN.1-encoded Kerberos message in lib/krb5/asn.1/asn1_encode.c may lead to DoS 6. Package List: Red Hat Enterprise Linux BaseOS (v. 8): Source: krb5-1.18.2-8.el8.src.rpm aarch64: krb5-debuginfo-1.18.2-8.el8.aarch64.rpm krb5-debugsource-1.18.2-8.el8.aarch64.rpm krb5-devel-1.18.2-8.el8.aarch64.rpm krb5-devel-debuginfo-1.18.2-8.el8.aarch64.rpm krb5-libs-1.18.2-8.el8.aarch64.rpm krb5-libs-debuginfo-1.18.2-8.el8.aarch64.rpm krb5-pkinit-1.18.2-8.el8.aarch64.rpm krb5-pkinit-debuginfo-1.18.2-8.el8.aarch64.rpm krb5-server-1.18.2-8.el8.aarch64.rpm krb5-server-debuginfo-1.18.2-8.el8.aarch64.rpm krb5-server-ldap-1.18.2-8.el8.aarch64.rpm krb5-server-ldap-debuginfo-1.18.2-8.el8.aarch64.rpm krb5-workstation-1.18.2-8.el8.aarch64.rpm krb5-workstation-debuginfo-1.18.2-8.el8.aarch64.rpm libkadm5-1.18.2-8.el8.aarch64.rpm libkadm5-debuginfo-1.18.2-8.el8.aarch64.rpm ppc64le: krb5-debuginfo-1.18.2-8.el8.ppc64le.rpm krb5-debugsource-1.18.2-8.el8.ppc64le.rpm krb5-devel-1.18.2-8.el8.ppc64le.rpm krb5-devel-debuginfo-1.18.2-8.el8.ppc64le.rpm krb5-libs-1.18.2-8.el8.ppc64le.rpm krb5-libs-debuginfo-1.18.2-8.el8.ppc64le.rpm krb5-pkinit-1.18.2-8.el8.ppc64le.rpm krb5-pkinit-debuginfo-1.18.2-8.el8.ppc64le.rpm krb5-server-1.18.2-8.el8.ppc64le.rpm krb5-server-debuginfo-1.18.2-8.el8.ppc64le.rpm krb5-server-ldap-1.18.2-8.el8.ppc64le.rpm krb5-server-ldap-debuginfo-1.18.2-8.el8.ppc64le.rpm krb5-workstation-1.18.2-8.el8.ppc64le.rpm krb5-workstation-debuginfo-1.18.2-8.el8.ppc64le.rpm libkadm5-1.18.2-8.el8.ppc64le.rpm libkadm5-debuginfo-1.18.2-8.el8.ppc64le.rpm s390x: krb5-debuginfo-1.18.2-8.el8.s390x.rpm krb5-debugsource-1.18.2-8.el8.s390x.rpm krb5-devel-1.18.2-8.el8.s390x.rpm krb5-devel-debuginfo-1.18.2-8.el8.s390x.rpm krb5-libs-1.18.2-8.el8.s390x.rpm krb5-libs-debuginfo-1.18.2-8.el8.s390x.rpm krb5-pkinit-1.18.2-8.el8.s390x.rpm krb5-pkinit-debuginfo-1.18.2-8.el8.s390x.rpm krb5-server-1.18.2-8.el8.s390x.rpm krb5-server-debuginfo-1.18.2-8.el8.s390x.rpm krb5-server-ldap-1.18.2-8.el8.s390x.rpm krb5-server-ldap-debuginfo-1.18.2-8.el8.s390x.rpm krb5-workstation-1.18.2-8.el8.s390x.rpm krb5-workstation-debuginfo-1.18.2-8.el8.s390x.rpm libkadm5-1.18.2-8.el8.s390x.rpm libkadm5-debuginfo-1.18.2-8.el8.s390x.rpm x86_64: krb5-debuginfo-1.18.2-8.el8.i686.rpm krb5-debuginfo-1.18.2-8.el8.x86_64.rpm krb5-debugsource-1.18.2-8.el8.i686.rpm krb5-debugsource-1.18.2-8.el8.x86_64.rpm krb5-devel-1.18.2-8.el8.i686.rpm krb5-devel-1.18.2-8.el8.x86_64.rpm krb5-devel-debuginfo-1.18.2-8.el8.i686.rpm krb5-devel-debuginfo-1.18.2-8.el8.x86_64.rpm krb5-libs-1.18.2-8.el8.i686.rpm krb5-libs-1.18.2-8.el8.x86_64.rpm krb5-libs-debuginfo-1.18.2-8.el8.i686.rpm krb5-libs-debuginfo-1.18.2-8.el8.x86_64.rpm krb5-pkinit-1.18.2-8.el8.i686.rpm krb5-pkinit-1.18.2-8.el8.x86_64.rpm krb5-pkinit-debuginfo-1.18.2-8.el8.i686.rpm krb5-pkinit-debuginfo-1.18.2-8.el8.x86_64.rpm krb5-server-1.18.2-8.el8.i686.rpm krb5-server-1.18.2-8.el8.x86_64.rpm krb5-server-debuginfo-1.18.2-8.el8.i686.rpm krb5-server-debuginfo-1.18.2-8.el8.x86_64.rpm krb5-server-ldap-1.18.2-8.el8.i686.rpm krb5-server-ldap-1.18.2-8.el8.x86_64.rpm krb5-server-ldap-debuginfo-1.18.2-8.el8.i686.rpm krb5-server-ldap-debuginfo-1.18.2-8.el8.x86_64.rpm krb5-workstation-1.18.2-8.el8.x86_64.rpm krb5-workstation-debuginfo-1.18.2-8.el8.i686.rpm krb5-workstation-debuginfo-1.18.2-8.el8.x86_64.rpm libkadm5-1.18.2-8.el8.i686.rpm libkadm5-1.18.2-8.el8.x86_64.rpm libkadm5-debuginfo-1.18.2-8.el8.i686.rpm libkadm5-debuginfo-1.18.2-8.el8.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2020-28196 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/ 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2021 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYKPt2NzjgjWX9erEAQiecA/+O4dLsLNTliVlPtBWDBzMADeENnGclmCr 7cuMfKxlZENd/QxcRPepI6lKamcHl1o2XGYFWZz6Ptxq/FRkwIRlse1bw1ui2NNQ B7PtWWRNxUJm+RdvpwwJcR3RL+HLCxfTKGxhswx49s35aMf9QP76IV5r4YjfeDV2 11W5cKtt+uwDTWieVHdZ6NkenU7kxJWxAy6NMCCGnBFEbx771PIYGH9JdTVGQ37W g1YdkYz3H1UxAAjUSI/4yK33+ZOU4Yd8lpVeN0V3HI7akuv9XgJITC0jehAVZPO0 cX7fuYz4emKDnJV3XapLlm6H+6xsYbgSE2Wyrk6WdiS0LqqeBcl+fBeb3i6d7RTt hY2ANdn+dq/c/d/v0ls5enu8iUDVONcK84hL777nw6YdhP7WfIpWtjnekTnsXYGw XOCGvTe216f46JxchgNTJ0Oqkh16aHdrsyLUuvbOdMjlSJoVblra2ZVOHgBdxW+q u/Xh6ASntG7Cf1ridlu9vEb10ZK+PRdVh29AK2RBJoTjvbWE80LTBHdZ7eXYl4KL MJKKZ/IPcJbW37Z2TvlzBNslPKnZYhfLdUiGEiFGSJuyGISfOqL2y1c3O/eZPb2N vpsNaB0uyo6hMW1nmkHcRLgN7C8fx2yD2tAbhCCOOp1AEDnbJ4RcBgs8+/8qfdxk MtLcKg7fb+o=N7Sg -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce