An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. An adversary with access to precise enough information about memory accesses (typically, an untrusted operating system attacking a secure enclave) can recover an RSA private key after observing the victim performing a single private-key operation, if the window size (MBEDTLSMPIWINDOW_SIZE) used for the exponentiation is 3 or smaller.
{
"versions": [
{
"introduced": "0"
},
{
"fixed": "2.28.2"
},
{
"introduced": "3.0.0"
},
{
"fixed": "3.3.0"
}
]
}