CVE-2021-3737
26Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 12%
exploitation probability
12%top 4% of all CVEs
observed exploitation
nono source reports it
A 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
n/a · pythonReferences
https://bugs.python.org/issue44022https://bugzilla.redhat.com/show_bug.cgi?id=1995162https://github.com/python/cpython/pull/25916https://github.com/python/cpython/pull/26503https://lists.debian.org/debian-lts-announce/2023/05/msg00024.htmlhttps://lists.debian.org/debian-lts-announce/2023/06/msg00039.htmlhttps://lists.debian.org/debian-lts-announce/2024/11/msg00024.htmlhttps://lists.debian.org/debian-lts-announce/2024/12/msg00000.htmlhttps://python-security.readthedocs.io/vuln/urllib-100-continue-loop.htmlhttps://security.netapp.com/advisory/ntap-20220407-0009/https://ubuntu.com/security/CVE-2021-3737https://www.oracle.com/security-alerts/cpujul2022.html