Oracle Linux: CVE-2020-12401: ELSA-2020-4076: nss and nspr security, bug fix, and enhancement update (MODERATE) (Multiple Advisories)
Description
During ECDSA signature generation, padding applied in the nonce designed to ensure constant-time scalar multiplication was removed, resulting in variable-time execution dependent on secret data. This vulnerability affects Firefox < 80 and Firefox for Android < 80. 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.
Solution(s)
- oracle-linux-upgrade-nspr
- oracle-linux-upgrade-nspr-devel
- oracle-linux-upgrade-nss
- oracle-linux-upgrade-nss-devel
- oracle-linux-upgrade-nss-pkcs11-devel
- oracle-linux-upgrade-nss-softokn
- oracle-linux-upgrade-nss-softokn-devel
- oracle-linux-upgrade-nss-softokn-freebl
- oracle-linux-upgrade-nss-softokn-freebl-devel
- oracle-linux-upgrade-nss-sysinit
- oracle-linux-upgrade-nss-tools
- oracle-linux-upgrade-nss-util
- oracle-linux-upgrade-nss-util-devel
- oracle-linux-upgrade-ython
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