要点
- CVE-2019-11840 は golang.org/x/crypto に影響する深刻度「中」 (CVSS 5.9) の脆弱性です。
- 今後30日間に悪用される確率(EPSS):3.5%(全脆弱性の 89.0% より高い)。
- 対処:0.0.0-20190320223903-b7391e95e576 以降に更新してください。
| パッケージ | 影響を受けるバージョン | 修正済みバージョン |
|---|
| golang.org/x/crypto Go | < 0.0.0-20190320223903-b7391e95e576
| 0.0.0-20190320223903-b7391e95e576
|
概要
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 の説明
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.
golang.org/x/crypto のその他の脆弱性
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