Описание
When performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; which leaked partial information about the nonce used during signature generation. Given an electro-magnetic trace of a few signature generations, the private key could have been computed. 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.
Отчет
This is a side channel attack which can used to exact pirate keys when ECDSA signatures are being generated. This attack is only feasible when the attacker is local to the machine or in certain cross-VM scenarios where the signature is being generated. Attacks over the network or via the internet are not feasible.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 5 | nss | Out of support scope | ||
| Red Hat Enterprise Linux 6 | nss | Out of support scope | ||
| Red Hat OpenShift Container Platform 4 | nss-altfiles | Not affected | ||
| Red Hat Enterprise Linux 7 | nspr | Fixed | RHSA-2020:4076 | 29.09.2020 |
| Red Hat Enterprise Linux 7 | nss | Fixed | RHSA-2020:4076 | 29.09.2020 |
| Red Hat Enterprise Linux 7 | nss-softokn | Fixed | RHSA-2020:4076 | 29.09.2020 |
| Red Hat Enterprise Linux 7 | nss-util | Fixed | RHSA-2020:4076 | 29.09.2020 |
| Red Hat Enterprise Linux 8 | nss | Fixed | RHSA-2021:0538 | 16.02.2021 |
| Red Hat OpenShift Do | openshiftdo/odo-init-image-rhel7 | Fixed | RHSA-2021:0949 | 22.03.2021 |
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Дополнительная информация
Статус:
EPSS
4.4 Medium
CVSS3
Связанные уязвимости
When performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; which leaked partial information about the nonce used during signature generation. Given an electro-magnetic trace of a few signature generations, the private key could have been computed. This vulnerability affects Firefox < 80 and Firefox for Android < 80.
When performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; which leaked partial information about the nonce used during signature generation. Given an electro-magnetic trace of a few signature generations, the private key could have been computed. This vulnerability affects Firefox < 80 and Firefox for Android < 80.
When performing EC scalar point multiplication, the wNAF point multipl ...
When performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; which leaked partial information about the nonce used during signature generation. Given an electro-magnetic trace of a few signature generations, the private key could have been computed. This vulnerability affects Firefox < 80 and Firefox for Android < 80.
Уязвимость компонента Knowledge Management программной интеграционной платформы SAP NetWeaver, позволяющая нарушителю осуществить межсайтовые сценарные атаки
EPSS
4.4 Medium
CVSS3