CVE-2021-3737 describes a denial-of-service vulnerability in Python's HTTP client code, affecting products from vendors like Canonical, Fedora, NetApp, Oracle, and Red Hat. An attacker controlling an HTTP server can exploit this flaw to induce an infinite loop in a client script, consuming CPU resources. Rated 7.5 HIGH, this vulnerability has a low attack complexity and requires no user interaction or privileges, primarily impacting system availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 3.6.0, < 3.6.14CPE matchmatch criteria | cpe:2.3:a:python:python:*:*:*:*:*:*:*:* | ||
>= 3.7.0, < 3.7.11CPE matchmatch criteria | cpe:2.3:a:python:python:*:*:*:*:*:*:*:* | ||
>= 3.8.0, < 3.8.11CPE matchmatch criteria | cpe:2.3:a:python:python:*:*:*:*:*:*:*:* | ||
>= 3.9.0, < 3.9.6CPE matchmatch criteria | cpe:2.3:a:python:python:*:*:*:*:*:*:*:* | ||
8.0CPE matchmatch criteria | cpe:2.3:a:redhat:codeready_linux_builder:8.0:*:*:*:*:*:*:* |
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:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
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Oct 29, 2024A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker who controls the HTTP server to make the client script enter an infinite loop consuming CPU time. The highest threat from this vulnerability is to system availability.
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