CVE-2021-21419 describes a denial-of-service vulnerability in Eventlet, a Python concurrent networking library, and its associated Fedora packages. A malicious actor can exhaust memory on the Eventlet side by sending excessively large or highly compressed WebSocket frames. This vulnerability has a CVSS score of 5.3 (Medium), indicating it can be exploited over the network with low complexity and no user interaction, leading to a loss of availability. There is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed on the CISA KEV catalog.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 0.10, < 0.31.0CPE matchmatch criteria | cpe:2.3:a:eventlet:eventlet:*:*:*:*:*:*:*:* | ||
33CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | ||
34CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
February Third Party Package Updates in Splunk Enterprise
Feb 14, 2023Improper Handling of Highly Compressed Data (Data Amplification) and Memory Allocation with Excessive Size Value in eventlet
May 7, 2021python-eventlet: improper handling of highly compressed data and memory allocation with excessive size allows DoS
May 6, 2021