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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.3747 libsepol security update 10 November 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: libsepol Publisher: Red Hat Operating System: Red Hat UNIX variants (UNIX, Linux, OSX) Impact/Access: Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-36087 CVE-2021-36086 CVE-2021-36085 CVE-2021-36084 Original Bulletin: https://access.redhat.com/errata/RHSA-2021:4513 Comment: This advisory references vulnerabilities in products which run on platforms other than Red Hat. It is recommended that administrators running libsepol check for an updated version of the software for their operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: libsepol security update Advisory ID: RHSA-2021:4513-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:4513 Issue date: 2021-11-09 CVE Names: CVE-2021-36084 CVE-2021-36085 CVE-2021-36086 CVE-2021-36087 ===================================================================== 1. Summary: An update for libsepol 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 Red Hat Enterprise Linux CRB (v. 8) - aarch64, ppc64le, s390x, x86_64 3. Description: The libsepol library provides an API for the manipulation of SELinux binary policies. It is used by checkpolicy (the policy compiler) and similar tools, as well as by programs like load_policy that need to perform specific transformations on binary policies (for example, customizing policy boolean settings). Security Fix(es): * libsepol: use-after-free in __cil_verify_classperms() (CVE-2021-36084) * libsepol: use-after-free in __cil_verify_classperms() (CVE-2021-36085) * libsepol: use-after-free in cil_reset_classpermission() (CVE-2021-36086) * libsepol: heap-based buffer overflow in ebitmap_match_any() (CVE-2021-36087) 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 8.5 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 5. Bugs fixed (https://bugzilla.redhat.com/): 1979662 - CVE-2021-36084 libsepol: use-after-free in __cil_verify_classperms() 1979664 - CVE-2021-36085 libsepol: use-after-free in __cil_verify_classperms() 1979666 - CVE-2021-36086 libsepol: use-after-free in cil_reset_classpermission() 1979668 - CVE-2021-36087 libsepol: heap-based buffer overflow in ebitmap_match_any() 6. Package List: Red Hat Enterprise Linux BaseOS (v. 8): Source: libsepol-2.9-3.el8.src.rpm aarch64: libsepol-2.9-3.el8.aarch64.rpm libsepol-debuginfo-2.9-3.el8.aarch64.rpm libsepol-debugsource-2.9-3.el8.aarch64.rpm libsepol-devel-2.9-3.el8.aarch64.rpm ppc64le: libsepol-2.9-3.el8.ppc64le.rpm libsepol-debuginfo-2.9-3.el8.ppc64le.rpm libsepol-debugsource-2.9-3.el8.ppc64le.rpm libsepol-devel-2.9-3.el8.ppc64le.rpm s390x: libsepol-2.9-3.el8.s390x.rpm libsepol-debuginfo-2.9-3.el8.s390x.rpm libsepol-debugsource-2.9-3.el8.s390x.rpm libsepol-devel-2.9-3.el8.s390x.rpm x86_64: libsepol-2.9-3.el8.i686.rpm libsepol-2.9-3.el8.x86_64.rpm libsepol-debuginfo-2.9-3.el8.i686.rpm libsepol-debuginfo-2.9-3.el8.x86_64.rpm libsepol-debugsource-2.9-3.el8.i686.rpm libsepol-debugsource-2.9-3.el8.x86_64.rpm libsepol-devel-2.9-3.el8.i686.rpm libsepol-devel-2.9-3.el8.x86_64.rpm Red Hat Enterprise Linux CRB (v. 8): aarch64: libsepol-debuginfo-2.9-3.el8.aarch64.rpm libsepol-debugsource-2.9-3.el8.aarch64.rpm libsepol-static-2.9-3.el8.aarch64.rpm ppc64le: libsepol-debuginfo-2.9-3.el8.ppc64le.rpm libsepol-debugsource-2.9-3.el8.ppc64le.rpm libsepol-static-2.9-3.el8.ppc64le.rpm s390x: libsepol-debuginfo-2.9-3.el8.s390x.rpm libsepol-debugsource-2.9-3.el8.s390x.rpm libsepol-static-2.9-3.el8.s390x.rpm x86_64: libsepol-debuginfo-2.9-3.el8.i686.rpm libsepol-debuginfo-2.9-3.el8.x86_64.rpm libsepol-debugsource-2.9-3.el8.i686.rpm libsepol-debugsource-2.9-3.el8.x86_64.rpm libsepol-static-2.9-3.el8.i686.rpm libsepol-static-2.9-3.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-2021-36084 https://access.redhat.com/security/cve/CVE-2021-36085 https://access.redhat.com/security/cve/CVE-2021-36086 https://access.redhat.com/security/cve/CVE-2021-36087 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.5_release_notes/ 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2021 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYYreVNzjgjWX9erEAQioQw/+OLkMoaN1RrnpneqoJkSGTgZ9mccanT1x vaYpKDGD7uEwp/RrHE0fkI4No3e8+KFpQGXlCxbjasHSjmL9Y6kAGBwrYqEJak9e wWCqa3GWnpzUw8Xm4RM1tLRn+Nhg00CutoKCrOYxil22YFOeCyHSRRy9aAdt2i8/ Zs/TXiLpbYNVgT3h29l+VR4vsBC24mKmYLQPRRzu350dubQwAO0Ro9/qesGrTTH9 BhyJZuI/MFkFT94Jk4tVhy8gwJcjyH+QXwjdNckPUuckUlpV5vJNm+fwLKHY6pDu NHhYhPPInDKBVihkTGY7JFccxQk2jU8K9IfU8nmbo9MbHnmlmWfW/taJFJf77KDB pDBydINlOkRnUhERfTUdIPE+Pk1gFz+eCBiVyP8+pRf1D5DbbUzNQJdM66b/TyiU uy49agg2cycWa7YbRVPtIiB3k3xqMaDlcBc6+a8DoXhpOEISPcMDAE7QfXgs4/kH /vgee2WNJLYkA9AEHwiDMqeI6D53IA/vpqEnuzZkrjKfY/IxX4G+DyDNUy0bxIvi PeuDZ3OnhR2nb7p+Wk1+TqtBerTvkcp8BxkXFsvhkRPUqZcelvQtE3YedhtlhUQd mW2Iz1QMuRxi8V7sLvKcQhNykQXEcIQCmQp8aedVPZjjIvgs+ay9KYoi8TZ+33HJ 3nBrTEEUKI4= =OQTP - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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