PT-2021-12814 · Zcashd · Zcashd

Michael Davidson · Published 2021-02-05 · Updated 2021-02-08 · CVE-2020-8806

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions: Zcashd versions prior to 2.1.1-1

Description: The issue allows attackers to trigger consensus failure and double spending. A valid chain could be incorrectly rejected because timestamp requirements on block headers were not properly enforced.

Recommendations: For versions prior to 2.1.1-1, update to version 2.1.1-1 or later to resolve the issue. As a temporary workaround, consider implementing additional validation checks on block headers to enforce timestamp requirements until a patch is applied. Restrict access to the consensus mechanism to minimize the risk of exploitation.

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2020-8806

Affected Products

Zcashd

References · 4

• https://osv.dev/vulnerability/CVE-2020-8806 · Vendor Advisory
• https://electriccoin.co/blog/new-releases-2-1-1-and-hotfix-2-1-1-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-8806 · Security Note
• https://t.me/cibsecurity/23153 · Telegram Post