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GO-2022-0209
No affected components available
XORKeyStream generates incorrect and insecure output for very large inputs.
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.
The issue might affect uses of golang.org/x/crypto/nacl with extremely large messages.
Architectures other than amd64 and uses that generate less than 256 GiB of keystream for a single salsa20.XORKeyStream invocation are unaffected.
Measures severity based on intrinsic characteristics of the vulnerability, independent of environment.
No exploitation activity has been observed at this time. Continue routine monitoring.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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