A flaw was found in nss. Using the EM side-channel, it is possible to extract the position of zero and non-zero wNAF digits while nss-certutil tool performs scalar multiplication during the ECDSA signature generation, leaking partial information about the ECDSA nonce. Given a small number of ECDSA signatures, this information can be used to steal the private key. The highest threat from this vulnerability is to data confidentiality.
Platform | Package | Release Date | Advisory |
---|---|---|---|
Amazon Linux 1 | nspr | 2021-07-08 18:41 | ALAS-2021-1522 |
Amazon Linux 2 - Core | nspr | 2020-11-09 21:02 | ALAS2-2020-1559 |
Amazon Linux 2 - Core | nss | 2020-11-09 21:02 | ALAS2-2020-1559 |
Amazon Linux 1 | nss-softokn | 2021-07-08 18:41 | ALAS-2021-1522 |
Amazon Linux 2 - Core | nss-softokn | 2020-11-09 21:02 | ALAS2-2020-1559 |
Amazon Linux 1 | nss-util | 2021-07-08 18:41 | ALAS-2021-1522 |
Amazon Linux 2 - Core | nss-util | 2020-11-09 21:02 | ALAS2-2020-1559 |
Score Type | Score | Vector | |
---|---|---|---|
Amazon Linux | CVSSv3 | 4.4 | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N |
NVD | CVSSv2 | 1.9 | AV:L/AC:M/Au:N/C:P/I:N/A:N |
NVD | CVSSv3 | 4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |