CVE-2025-24371

Aliases:GHSA-22qq-3xwm-r5x4GO-2025-3442
Advisory lineage Upstream: 0 Downstream: 2
Deferred
Published: 03 Feb 2025, 21:20
Last modified:04 Feb 2025, 19:16

Vulnerability Summary

Overall Risk (default)
medium
28/100
CVSS Score
7.1 HIGH
v4.0 (cve.org)
EPSS Score
0.14% LOW
0% probability -0.08%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

03 Feb 2025, 21:20
Published
Vulnerability first disclosed
04 Feb 2025, 19:16
Last Modified
Vulnerability information updated

Description

CometBFT is a distributed, Byzantine fault-tolerant, deterministic state machine replication engine. In the `blocksync` protocol peers send their `base` and `latest` heights when they connect to a new node (`A`), which is syncing to the tip of a network. `base` acts as a lower ground and informs `A` that the peer only has blocks starting from height `base`. `latest` height informs `A` about the latest block in a network. Normally, nodes would only report increasing heights. If `B` fails to provide the latest block, `B` is removed and the `latest` height (target height) is recalculated based on other nodes `latest` heights. The existing code however doesn't check for the case where `B` first reports `latest` height `X` and immediately after height `Y`, where `X > Y`. `A` will be trying to catch up to 2000 indefinitely. This condition requires the introduction of malicious code in the full node first reporting some non-existing `latest` height, then reporting lower `latest` height and nodes which are syncing using `blocksync` protocol. This issue has been patched in versions 1.0.1 and 0.38.17 and all users are advised to upgrade. Operators may attempt to ban malicious peers from the network as a workaround.

CVSS Metrics

  • v4.0•HIGH•Score: 7.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  • v4.0•HIGH•Score: 7.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  • v4.0•MEDIUM•Score: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

EPSS Trends

Current EPSS score: 0.14%• Percentile: 34%

Techniques & Countermeasures

  • CWE-703•Improper Check or Handling of Exceptional Conditions

    The product does not properly anticipate or handle exceptional conditions that rarely occur during normal operation of the product.

Affected Systems

  • cometbft•cometbft

    < 0.38.17 | = 1.0.0

  • github.com/cometbft•cometbft

    < 1.0.1 | ≥ 1.0.0-alpha.1, < 1.0.1 | < 0.38.17

References (8)