CVE-2021-41272

Besu is an Ethereum client written in Java. Starting in version 21.10.0, changes in the implementation of the SHL, SHR, and SAR operations resulted in the introduction of a signed type coercion error in values that represent negative values for 32 bit signed integers. Smart contracts that ask for shifts between approximately 2 billion and 4 billion bits (nonsensical but valid values for the operation) will fail to execute and hence fail to validate. In networks where vulnerable versions are mining with other clients or non-vulnerable versions this will result in a fork and the relevant transactions will not be included in the fork. In networks where vulnerable versions are not mining (such as Rinkeby) no fork will result and the validator nodes will stop accepting blocks. In networks where only vulnerable versions are mining the relevant transaction will not be included in any blocks. When the network adds a non-vulnerable version the network will act as in the first case. Besu 21.10.2 contains a patch for this issue. Besu 21.7.4 is not vulnerable and clients can roll back to that version. There is a workaround available: Once a transaction with the relevant shift operations is included in the canonical chain, the only remediation is to make sure all nodes are on non-vulnerable versions.
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:linuxfoundation:besu:21.10.0:-:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:besu:21.10.0:rc1:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:besu:21.10.0:rc2:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:besu:21.10.0:rc3:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:besu:21.10.0:rc4:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:besu:21.10.1:*:*:*:*:*:*:*

History

16 Dec 2021, 16:05

Type Values Removed Values Added
CVSS v2 : unknown
v3 : 7.5
v2 : 5.0
v3 : 7.5
CPE cpe:2.3:a:linuxfoundation:besu:21.10.0:rc1:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:besu:21.10.0:-:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:besu:21.10.0:rc4:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:besu:21.10.0:rc3:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:besu:21.10.1:*:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:besu:21.10.0:rc2:*:*:*:*:*:*
References (MISC) https://github.com/hyperledger/besu/commit/4170524ac3b45185704fcfbdeeb71b0b05dfa0a1 - (MISC) https://github.com/hyperledger/besu/commit/4170524ac3b45185704fcfbdeeb71b0b05dfa0a1 - Patch, Third Party Advisory
References (CONFIRM) https://github.com/hyperledger/besu/security/advisories/GHSA-7pg2-p5vj-xp5h - (CONFIRM) https://github.com/hyperledger/besu/security/advisories/GHSA-7pg2-p5vj-xp5h - Patch, Third Party Advisory
References (MISC) https://github.com/hyperledger/besu/pull/3039 - (MISC) https://github.com/hyperledger/besu/pull/3039 - Issue Tracking, Patch, Third Party Advisory

13 Dec 2021, 21:15

Type Values Removed Values Added
New CVE

Information

Published : 2021-12-13 21:15

Updated : 2023-12-10 14:09


NVD link : CVE-2021-41272

Mitre link : CVE-2021-41272

CVE.ORG link : CVE-2021-41272


JSON object : View

Products Affected

linuxfoundation

  • besu
CWE
CWE-681

Incorrect Conversion between Numeric Types