{
  "id": "openEuler-SA-2023-1430",
  "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2023-1430",
  "title": "An update for edk2 is now available for openEuler-22.03-LTS",
  "severity": "Medium",
  "description": "EDK II is a modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications. \n\nSecurity Fix(es):\n\nA 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)",
  "cves": [
    {
      "id": "CVE-2022-4304",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-4304",
      "severity": "Medium"
    }
  ]
}