CVE-2021-21271 is a Denial of Service (DoS) vulnerability affecting Tendermint Core versions 0.34.0 through 0.34.2. The flaw arises from inconsistent timestamping of "DuplicateVoteEvidence" across different nodes when a double-sign event occurs, leading to nodes proposing invalid evidence and being disconnected by peers. With a CVSS score of 6.5 (Medium), this vulnerability can be exploited remotely with low complexity by an authenticated attacker, resulting in high availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 0.34.0, <= 0.34.2CPE matchmatch criteria | cpe:2.3:a:tendermint:tendermint:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.