PT-2021-23899 · Unknown · Hyperledger Fabric

Govulnbot · Published 2021-11-18 · Updated 2022-05-25 · CVE-2021-43667

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:N/A:H

Name of the Vulnerable Software and Affected Versions: HyperLedger Fabric versions 1.4.0 through 2.1.0

Description: A bug in HyperLedger Fabric allows an attacker to crash any leader node by constructing a message with a nil payload and sending it using the forwardToLeader method. The developers have acknowledged and fixed this issue.

Recommendations: For HyperLedger Fabric version 1.4.0, update to a version that includes the fix for this bug. For HyperLedger Fabric version 2.0.0, update to a version that includes the fix for this bug. For HyperLedger Fabric version 2.1.0, update to a version that includes the fix for this bug. As a temporary workaround, consider restricting the use of the forwardToLeader method until a patch is available.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2021-43667

GHSA-VJJ6-5M9F-WQJW

Affected Products

Hyperledger Fabric

References · 7

• 🔥 https://jira.hyperledger.org/browse/FAB-18529 · Exploit
• https://github.com/hyperledger/fabric/pull/2844 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-43667 · Security Note
• https://osv.dev/vulnerability/GHSA-vjj6-5m9f-wqjw · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-43667 · Vendor Advisory
• https://github.com/hyperledger/fabric/pull/2838/commits/ebf94b10ecc86d3a91619b98befc52277b1e3474 · Note
• https://t.me/cibsecurity/32610 · Telegram Post