Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.3798 libX11 security update 10 November 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: libX11 Publisher: Red Hat Operating System: Red Hat Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Unauthorised Access -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2021-31535 Reference: ESB-2021.2924 ESB-2021.2129 ESB-2021.1801 Original Bulletin: https://access.redhat.com/errata/RHSA-2021:4326 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: libX11 security update Advisory ID: RHSA-2021:4326-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:4326 Issue date: 2021-11-09 CVE Names: CVE-2021-31535 ===================================================================== 1. Summary: An update for libX11 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 AppStream (v. 8) - aarch64, noarch, ppc64le, s390x, x86_64 3. Description: The libX11 packages contain the core X11 protocol client library. Security Fix(es): * libX11: missing request length checks (CVE-2021-31535) 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/): 1961822 - CVE-2021-31535 libX11: missing request length checks 6. Package List: Red Hat Enterprise Linux AppStream (v. 8): Source: libX11-1.6.8-5.el8.src.rpm aarch64: libX11-1.6.8-5.el8.aarch64.rpm libX11-debuginfo-1.6.8-5.el8.aarch64.rpm libX11-debugsource-1.6.8-5.el8.aarch64.rpm libX11-devel-1.6.8-5.el8.aarch64.rpm libX11-xcb-1.6.8-5.el8.aarch64.rpm libX11-xcb-debuginfo-1.6.8-5.el8.aarch64.rpm noarch: libX11-common-1.6.8-5.el8.noarch.rpm ppc64le: libX11-1.6.8-5.el8.ppc64le.rpm libX11-debuginfo-1.6.8-5.el8.ppc64le.rpm libX11-debugsource-1.6.8-5.el8.ppc64le.rpm libX11-devel-1.6.8-5.el8.ppc64le.rpm libX11-xcb-1.6.8-5.el8.ppc64le.rpm libX11-xcb-debuginfo-1.6.8-5.el8.ppc64le.rpm s390x: libX11-1.6.8-5.el8.s390x.rpm libX11-debuginfo-1.6.8-5.el8.s390x.rpm libX11-debugsource-1.6.8-5.el8.s390x.rpm libX11-devel-1.6.8-5.el8.s390x.rpm libX11-xcb-1.6.8-5.el8.s390x.rpm libX11-xcb-debuginfo-1.6.8-5.el8.s390x.rpm x86_64: libX11-1.6.8-5.el8.i686.rpm libX11-1.6.8-5.el8.x86_64.rpm libX11-debuginfo-1.6.8-5.el8.i686.rpm libX11-debuginfo-1.6.8-5.el8.x86_64.rpm libX11-debugsource-1.6.8-5.el8.i686.rpm libX11-debugsource-1.6.8-5.el8.x86_64.rpm libX11-devel-1.6.8-5.el8.i686.rpm libX11-devel-1.6.8-5.el8.x86_64.rpm libX11-xcb-1.6.8-5.el8.i686.rpm libX11-xcb-1.6.8-5.el8.x86_64.rpm libX11-xcb-debuginfo-1.6.8-5.el8.i686.rpm libX11-xcb-debuginfo-1.6.8-5.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-2021-31535 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 iQIVAwUBYYreK9zjgjWX9erEAQhC8w//Ujz6OHnq5956ZCePDTRqMWQdCIibXVhG wYzFnS6AerdBArGJ9XaPLMxF/bCGrD2JzVgneYjT5r/GISsZNh0ZVuMG1Y+lj0ZS IUCGZ6FccdGqPlV+6pYEQye+met57JOvcKyCp6o+cE49EGz/SnSFSBjxFrTxkft5 QpEP8DJP2kfODOtzTFSGrtKQ56zJXr3W4JLrfs6kjz560Wsrng7EnveTQzbVhGx8 mjtLQB4TNIaKTS9vsYLKzA3oEtnWoOn0bXijZ+9ReD8r60nXbCirkOnCus2coyJ5 N8tOWPbQomsYEMGmOabkAhLErwJVTvAX2QS5qHJQzLHnQo1H7PWObkXDf9Vgvyf3 s7TKxmRI6U/zAmbLUG8PnEdXxyzqIYB+Y6DMdqp25RJ2tsDnT1OL2wI/A221WyOE aqZOQYpKq12w8WMenz4rctASUc/Ja1uFUZ1kS+EeL/z0idgV/8FoRA965autTtBp 5O0IwVw1MRBTh/EherYqh2Ge0oBbShbtPcEJsxRL13+mXIpROg5zDiEmdVClHIUT +McwHY5fkGgtVALg6e1XG1uYx7db+feJ36psStsMLwG6eFLXyQP/mbM0y6AfrmOU 5jW49d2e594EHtIBi39nXDvM6eLTDPuV/c8Sb6Vd1RN+690K3iOBpixGxszcf6AD MRViCNNJqPg= =G6/f - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBYYtUneNLKJtyKPYoAQiQjhAArToXU+YzgzFZ/YEb//5/EvdXvmHPpQUY qSKcAl6Rr0WwKp9xE9QWl3n0t8mpB4xZGlnPuPjL1Jr9yfz5ifDG+ykkt7znTb5N aQs6Z0cMrE+US5MmYOrlsHhWkqZBbgAbbjcIZGt0PoskoiSFA2L0XJUpNynXl6q9 HTeFyx+XAAd4gomwogt/SbtaM6VXyN6+oum7/Bt/9FNcyATxwKK4/fu/BBvsN9m3 QdiCRVShkYHlQKivB3JcaDW8gXQ7fPehi92KRBLCbNDOQ+2/VWotcYf+LqvRo+pO +uhDw041R3U8z6dFQ/3WDWlEwI8jbP6zPUuBEfMvMDtZETbhjeBMyf0xmcHbFsd7 NjQuyQT2ZRGfaStZQa5WaJg6apqtmvKfb0O8KVa73+CeDJ1QAfA8TUAp+a0fHWll kM0AvLRPCIDrQyGXn5NUtkwu23MqGP2+ESNMDid3XadHnD2Jossi1lP/hgBBRj+K mvaF2muk4QFE9bBYT2XdmsvHbXP3rDcNx5XK4z3HUD9+BoIYHlpzLrsUnyvf/7FK UX1xxY7xHRDExHpNdtav5jdmLSYy098oZUFUql/6tAYTP8pj4T3gdWQMdjrZ77fk QmcHljHycOWwdynUGKXCZ7N/jx3xDNoi/B6wH3AHR7CKVd2663jASprtv9xLEMD2 XviWIzkZM+M= =H7+j -----END PGP SIGNATURE-----