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Huawei EulerOS: Security Advisory for nss (EulerOS-SA-2021-1744)

Information

Severity

Severity

Low

Family

Family

Huawei EulerOS Local Security Checks

CVSSv2 Base

CVSSv2 Base

1.9

CVSSv2 Vector

CVSSv2 Vector

AV:L/AC:M/Au:N/C:P/I:N/A:N

Solution Type

Solution Type

Vendor Patch

Created

Created

2 years ago

Modified

Modified

2 years ago

Summary

The remote host is missing an update for the Huawei EulerOS 'nss' package(s) announced via the EulerOS-SA-2021-1744 advisory.

Insight

Insight

During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform electromagnetic-based side channel attacks to record traces leading to the recovery of the secret primes. *Note:* An unmodified Firefox browser does not generate RSA keys in normal operation and is not affected, but products built on top of it might.(CVE-2020-12402) 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.CVE-2020-12401

Affected Software

Affected Software

'nss' package(s) on Huawei EulerOS Virtualization release 2.9.0.

Detection Method

Detection Method

Checks if a vulnerable package version is present on the target host.

Solution

Solution

Please install the updated package(s).

Common Vulnerabilities and Exposures (CVE)