Kurz gesagt
- CVE-2019-11840 ist eine Schwachstelle (MITTEL (CVSS 5.9)) in golang.org/x/crypto.
- Wahrscheinlichkeit einer Ausnutzung in den nächsten 30 Tagen (EPSS): 3.5%, höher als bei 89.0% aller Schwachstellen.
- Abhilfe: auf 0.0.0-20190320223903-b7391e95e576 oder neuer aktualisieren.
| Package | Affected versions | Patched versions |
|---|
| golang.org/x/crypto Go | < 0.0.0-20190320223903-b7391e95e576
| 0.0.0-20190320223903-b7391e95e576
|
Description
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
NVD description
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.
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