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GHSA-r5c5-pr8j-pfp7

golang.org/x/crypto/salsa20/salsa uses insufficiently random values

Source: GitHub Advisory Database (reviewed) Moderate CVE-2019-11840

Packages

EcosystemPackageAffectedFixed in
Go golang.org/x/crypto < 0.0.0-20190320223903-b7391e95e576 0.0.0-20190320223903-b7391e95e576

Details

As written in the advisory (Markdown source, shown as plain text).

An issue was discovered in supplementary Go cryptography libraries, aka golang-googlecode-go-crypto, before 2019-03-20. A flaw was found in the amd64 implementation of golang.org/x/crypto/salsa20 and golang.org/x/crypto/salsa20/salsa. If more than 256 GiB of keystream is generated, or if the counter otherwise grows greater than 32 bits, the amd64 implementation will first generate incorrect output, and then cycle back to previously generated keystream. Repeated keystream bytes can lead to loss of confidentiality in encryption applications, or to predictability in CSPRNG applications. ### Specific Go Packages Affected golang.org/x/crypto/salsa20/salsa

References

External links from the advisory. They lead to third-party sites.