cve.bz

CVE-2019-11840

5.9 mediumEPSS 3.5%

Medium (5.9). EPSS 3.5% chance of exploitation in the next 30 days. Fixed in golang.org/x/crypto 0.0.0-20190320223903-b7391e95e576.

An issue was discovered in the supplementary Go cryptography library, golang.org/x/crypto, before v0.0.0-20190320223903-b7391e95e576. A flaw was found in the amd64 implementation of the golang.org/x/crypto/salsa20 and golang.org/x/crypto/salsa20/salsa packages. 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.

Severity

CVSS 3.1

5.9 medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
3.5% chance of exploitation in the next 30 days; higher than 89% of CVEs (scores of 2026-10-31)
CWE
CWE-330
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-r5c5-pr8j-pfp7Gogolang.org/x/crypto<0.0.0-20190320223903-b7391e95e5760.0.0-20190320223903-b7391e95e576
GO-2022-0209Gogolang.org/x/crypto<0.0.0-20190320223903-b7391e95e5760.0.0-20190320223903-b7391e95e576

References

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