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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.3209 USN-5088-1: EDK II vulnerabilities 24 September 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: EDK II Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Create Arbitrary Files -- Remote/Unauthenticated Increased Privileges -- Console/Physical Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2021-38575 CVE-2021-23840 CVE-2021-3712 CVE-2019-11098 Reference: ESB-2021.3001 ESB-2021.2891 ESB-2021.2885 Original Bulletin: https://ubuntu.com/security/notices/USN-5088-1 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-5088-1: EDK II vulnerabilities 23 September 2021 Several security issues were fixed in EDK II. Releases o Ubuntu 21.04 o Ubuntu 20.04 LTS Packages o edk2 - UEFI firmware for virtual machines Details It was discovered that EDK II incorrectly handled input validation in MdeModulePkg. A local user could possibly use this issue to cause EDK II to crash, resulting in a denial of service, obtain sensitive information or execute arbitrary code. ( CVE-2019-11098 ) Paul Kehrer discovered that OpenSSL used in EDK II incorrectly handled certain input lengths in EVP functions. An attacker could possibly use this issue to cause EDK II to crash, resulting in a denial of service. ( CVE-2021-23840 ) Ingo Schwarze discovered that OpenSSL used in EDK II incorrectly handled certain ASN.1 strings. An attacker could use this issue to cause EDK II to crash, resulting in a denial of service, or possibly obtain sensitive information. ( CVE-2021-3712 ) It was discovered that EDK II incorrectly decoded certain strings. A remote attacker could use this issue to cause EDK II to crash, resulting in a denial of service, or possibly execute arbitrary code. ( CVE-2021-38575 ) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 21.04 o qemu-efi-arm - 2020.11-4ubuntu0.1 o qemu-efi - 2020.11-4ubuntu0.1 o ovmf-ia32 - 2020.11-4ubuntu0.1 o qemu-efi-aarch64 - 2020.11-4ubuntu0.1 o ovmf - 2020.11-4ubuntu0.1 Ubuntu 20.04 o qemu-efi-arm - 0~20191122.bd85bf54-2ubuntu3.3 o qemu-efi - 0~20191122.bd85bf54-2ubuntu3.3 o qemu-efi-aarch64 - 0~20191122.bd85bf54-2ubuntu3.3 o ovmf - 0~20191122.bd85bf54-2ubuntu3.3 After a standard system update you need to restart the virtual machines that use the affected firmware to make all the necessary changes. References o CVE-2019-11098 o CVE-2021-3712 o CVE-2021-23840 o CVE-2021-38575 Related notices o USN-5051-1 : libssl-doc, libssl-dev, libssl1.1, openssl o USN-5051-2 : libssl-doc, libssl1.0.0, libssl-dev, openssl o USN-5051-3 : libssl1.0.0, openssl1.0, libssl1.0-dev o USN-4738-1 : libssl-doc, libssl1.0.0, libssl1.1, libcrypto1.1-udeb, libssl1.0-dev, libcrypto1.0.0-udeb, libssl-dev, libssl1.1-udeb, libssl1.0.0-udeb, openssl1.0, openssl - --------------------------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. 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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 iQIVAwUBYU0XLONLKJtyKPYoAQhpBA//TD+Q7HXnvCc37hIsZMWH5euh9bkbNC8m 7g9WTnv1SJCr9kJQOWcC5M8PeCx19+0mbxcThUg9ci6ZgEMnnUetRRjWm6KoMtqG EEXM3LcDKZE/boefOUUk7pJaCMZdtref+Wr5ElhIncGk70lzlyapi/odkcckaGCh o1bZspRL4FilJ5u865RrMhM07PtclEcspRhA99GiVliQNzUq0xkQSYn7B80/CrQp DbuqZ9/Tw7HC5Nub1lso5c0gTjDeSB/ZMyhgokL9DJ56AzFJf9vXWKgWxgsL1tUm Fwo1qNW4oOVTsAvG9wKPR8OKZZGNjAIi7XimY+o6dQCLmtrDKntsGHzTb29EK4xw SQQ5p19kWaioUl+TW7Uuqub6hFFVFAwEswJuO+M86qW3yc4phvBfULwaOnYecnbb mjiR/HxNlmBXbXyoJ8byy6Iq8VQR6Nqji7NZguAkE6mlAvad9VliGa614PAm6fhg a6FOhD2Wd2ccN63FXoiJpzIkuunhPw71bHmv0+lA7mIS0bBqo7iFBEumonU+oJ6n TzzAsBaJRfXmEBvzEsA4GjkkUYJNz1VebQyiHc4l8bTfkRK/fCXURSzIh4B3uL5w E9bWeLYxWvY0AZs/4fiSErVpeHHQ0vBKYDx3ltX+Teu3l9vyyYcAbIFaba/ausHh nxzNJEwvKQs= =QZ6A -----END PGP SIGNATURE-----