CVE-2019-11840 (Medium) detected in https://source.codeaurora.org/quic/chrome4sdp/chromium/src/third_party/dnscrypt-proxy/2.0.11, https://source.codeaurora.org/quic/chrome4sdp/chromium/src/third_party/dnscrypt-proxy/2.0.11

[mend-bolt-for-github]

CVE-2019-11840 - Medium Severity Vulnerability

Vulnerable Libraries - https://source.codeaurora.org/quic/chrome4sdp/chromium/src/third_party/dnscrypt-proxy/2.0.11, https://source.codeaurora.org/quic/chrome4sdp/chromium/src/third_party/dnscrypt-proxy/2.0.11

Vulnerability Details

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.
Mend Note: Converted from WS-2019-0030, on 2021-08-01.

Publish Date: 2019-05-09

URL: CVE-2019-11840

CVSS 3 Score Details (5.9)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: High
  • Integrity Impact: None
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://bugzilla.redhat.com/show_bug.cgi?id=1691529

Fix Resolution: Upgrade to version golang.org/x/crypto v0.0.0-0.20190320223903-b7391e95e576 or greater

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