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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.1702 sudo security and bug fix update 19 May 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: sudo Publisher: Red Hat Operating System: Red Hat Impact/Access: Increased Privileges -- Existing Account Modify Arbitrary Files -- Existing Account Access Confidential Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-23240 CVE-2021-23239 Reference: ESB-2021.0313 ESB-2021.0307 ESB-2021.0287 Original Bulletin: https://access.redhat.com/errata/RHSA-2021:1723 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Low: sudo security and bug fix update Advisory ID: RHSA-2021:1723-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:1723 Issue date: 2021-05-18 CVE Names: CVE-2021-23239 CVE-2021-23240 ===================================================================== 1. Summary: An update for sudo is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Low. 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: The sudo packages contain the sudo utility which allows system administrators to provide certain users with the permission to execute privileged commands, which are used for system management purposes, without having to log in as root. Security Fix(es): * sudo: symbolic link attack in SELinux-enabled sudoedit (CVE-2021-23240) * sudo: possible directory existence test due to race condition in sudoedit (CVE-2021-23239) 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 5. Bugs fixed (https://bugzilla.redhat.com/): 1915052 - CVE-2021-23239 sudo: possible directory existence test due to race condition in sudoedit 1915053 - CVE-2021-23240 sudo: symbolic link attack in SELinux-enabled sudoedit 1923825 - Upstream URL need to be updated 6. Package List: Red Hat Enterprise Linux BaseOS (v. 8): Source: sudo-1.8.29-7.el8.src.rpm aarch64: sudo-1.8.29-7.el8.aarch64.rpm sudo-debuginfo-1.8.29-7.el8.aarch64.rpm sudo-debugsource-1.8.29-7.el8.aarch64.rpm ppc64le: sudo-1.8.29-7.el8.ppc64le.rpm sudo-debuginfo-1.8.29-7.el8.ppc64le.rpm sudo-debugsource-1.8.29-7.el8.ppc64le.rpm s390x: sudo-1.8.29-7.el8.s390x.rpm sudo-debuginfo-1.8.29-7.el8.s390x.rpm sudo-debugsource-1.8.29-7.el8.s390x.rpm x86_64: sudo-1.8.29-7.el8.x86_64.rpm sudo-debuginfo-1.8.29-7.el8.x86_64.rpm sudo-debugsource-1.8.29-7.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-2021-23239 https://access.redhat.com/security/cve/CVE-2021-23240 https://access.redhat.com/security/updates/classification/#low 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 <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 iQIVAwUBYKPyEdzjgjWX9erEAQg6sQ/+PPIoGo6GDNpq1k/OXTsKtCRkOSl+6f+5 t6dw5I2EOG4b5EJWd4QNLrMHpooSE7M5lNIOtjhNJaVarh4g+QvId9aR3Ur0qGoG yej8a82/jBVifT/toB1jcU2cLtijhNAmQagkMz41W3ESD1gzQcNeN/DUnhguVte/ fhwYuh9JGYan1//oWMKi2/KLnUySjfM6OyFqn/MEly+k3SBgBayyaqvjZGtUCNSc tlpwYwjBiA6LoG/P9v2S/MjVBuPi7HjzMA2n8eNklV0lbDeCPPjq8cFj78EDHjvo 6lyd75XkldLFWLDJ2kMMbu+o49QZ58Bfnc1BRWFU64+fSA7XofGm5hmxK8apR3R/ sd6gg8gasVmcF0k4VfGc5aXwVUqHPgtW8/RVUnnF8C3OV0P2SHIbKCqj5j0o0yly TsBfHoqM8J3T8ZvhvoQWoLWeD5LmCF9eNqMpDyq8kQDfqS0zsIAMnRnk6asKxvsb kZEzRHfBG88511XV0MLRQRThN+stDk9blJs7ZT4kQ9+zmEkFC1aCDN7umVYx33bI bDZ467DB60a6sHKmVYZrWk1yKV4mQKhS4ZXug/MYx59X5PwJJtPbwOf60mOyVAEp ZvQ+y8pxEphTeD+VvhOWq/RbZE7ux4xPtRSXKkvY9EzPOmAf7HSEWNvT2+48wg6t ADn9nWcFpsM= =fKLG - -----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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