An update for edk2 is now available for openEuler-20.03-LTS-SP3 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2023-1429 Final 1.0 1.0 2023-07-15 Initial 2023-07-15 2023-07-15 openEuler SA Tool V1.0 2023-07-15 edk2 security update An update for edk2 is now available for openEuler-20.03-LTS-SP3. EDK II is a modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications. Security Fix(es): A timing based side channel exists in the OpenSSL RSA Decryption implementation which could be sufficient to recover a plaintext across a network in a Bleichenbacher style attack. To achieve a successful decryption an attacker would have to be able to send a very large number of trial messages for decryption. The vulnerability affects all RSA padding modes: PKCS#1 v1.5, RSA-OEAP and RSASVE. For example, in a TLS connection, RSA is commonly used by a client to send an encrypted pre-master secret to the server. An attacker that had observed a genuine connection between a client and a server could use this flaw to send trial messages to the server and record the time taken to process them. After a sufficiently large number of messages the attacker could recover the pre-master secret used for the original connection and thus be able to decrypt the application data sent over that connection.(CVE-2022-4304) An update for edk2 is now available for openEuler-20.03-LTS-SP3. openEuler Security has rated this update as having a security impact of medium. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. Medium edk2 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1429 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2022-4304 https://nvd.nist.gov/vuln/detail/CVE-2022-4304 openEuler-20.03-LTS-SP3 edk2-devel-202002-16.oe1.aarch64.rpm edk2-debuginfo-202002-16.oe1.aarch64.rpm edk2-debugsource-202002-16.oe1.aarch64.rpm python3-edk2-devel-202002-16.oe1.noarch.rpm edk2-aarch64-202002-16.oe1.noarch.rpm edk2-help-202002-16.oe1.noarch.rpm edk2-ovmf-202002-16.oe1.noarch.rpm edk2-202002-16.oe1.src.rpm edk2-debuginfo-202002-16.oe1.x86_64.rpm edk2-devel-202002-16.oe1.x86_64.rpm edk2-debugsource-202002-16.oe1.x86_64.rpm A timing based side channel exists in the OpenSSL RSA Decryption implementation which could be sufficient to recover a plaintext across a network in a Bleichenbacher style attack. To achieve a successful decryption an attacker would have to be able to send a very large number of trial messages for decryption. The vulnerability affects all RSA padding modes: PKCS#1 v1.5, RSA-OEAP and RSASVE. For example, in a TLS connection, RSA is commonly used by a client to send an encrypted pre-master secret to the server. An attacker that had observed a genuine connection between a client and a server could use this flaw to send trial messages to the server and record the time taken to process them. After a sufficiently large number of messages the attacker could recover the pre-master secret used for the original connection and thus be able to decrypt the application data sent over that connection. 2023-07-15 CVE-2022-4304 openEuler-20.03-LTS-SP3 Medium 5.9 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N edk2 security update 2023-07-15 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1429