Bleichenbacher Side-Channel Padding Oracle Attack in Nettle's RSA Decryption

CVE-2018-16869 · MEDIUM Severity

CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N

A Bleichenbacher type side-channel based padding oracle attack was found in the way nettle handles endian conversion of RSA decrypted PKCS#1 v1.5 data. An attacker who is able to run a process on the same physical core as the victim process, could use this flaw extract plaintext or in some cases downgrade any TLS connections to a vulnerable server.

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