CVE-2021-3737

Published: 31 August 2021

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.

Notes

Author	Note
leosilva	impish/devel is not affected, code supposed affected was patched already.

Priority

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package	Release	Status
python3.10 Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	Does not exist
	hirsute	Ignored (end of life)
	impish	Not vulnerable
	jammy	Not vulnerable
	lunar	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	Ignored (end of standard support)
	kinetic	Not vulnerable
	mantic	Does not exist
python3.4 Launchpad, Ubuntu, Debian	impish	Does not exist
	jammy	Does not exist
	lunar	Does not exist
	bionic	Does not exist
	focal	Does not exist
	hirsute	Does not exist
	upstream	Needs triage
	xenial	Ignored (end of standard support)
	trusty	Released (3.4.3-1ubuntu1~14.04.7+esm11) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	kinetic	Does not exist
	mantic	Does not exist
python3.5 Launchpad, Ubuntu, Debian	hirsute	Does not exist
	impish	Does not exist
	jammy	Does not exist
	lunar	Does not exist
	trusty	Needed
	bionic	Does not exist
	focal	Does not exist
	upstream	Needs triage
	xenial	Released (3.5.2-2ubuntu0~16.04.13+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	kinetic	Does not exist
	mantic	Does not exist
python3.6 Launchpad, Ubuntu, Debian	bionic	Released (3.6.9-1~18.04ubuntu1.6)
	focal	Does not exist
	hirsute	Does not exist
	impish	Does not exist
	jammy	Does not exist
	lunar	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	Ignored (end of standard support)
	kinetic	Does not exist
	mantic	Does not exist
python3.7 Launchpad, Ubuntu, Debian	impish	Does not exist
	jammy	Does not exist
	lunar	Does not exist
	focal	Does not exist
	hirsute	Does not exist
	trusty	Does not exist
	xenial	Ignored (end of standard support)
	bionic	Released (3.7.5-2ubuntu1~18.04.2)
	upstream	Needs triage
	kinetic	Does not exist
	mantic	Does not exist
python3.8 Launchpad, Ubuntu, Debian	bionic	Released (3.8.0-3ubuntu1~18.04.2)
	focal	Released (3.8.10-0ubuntu1~20.04.2)
	hirsute	Does not exist
	impish	Does not exist
	jammy	Does not exist
	lunar	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	Ignored (end of standard support)
	kinetic	Does not exist
	mantic	Does not exist
python3.9 Launchpad, Ubuntu, Debian	impish	Not vulnerable
	jammy	Does not exist
	lunar	Does not exist
	bionic	Does not exist
	focal	Released (3.9.5-3ubuntu0~20.04.1)
	trusty	Does not exist
	xenial	Ignored (end of standard support)
	upstream	Needs triage
	hirsute	Released (3.9.5-3ubuntu0~21.04.1)
	kinetic	Does not exist
	mantic	Does not exist

Severity score breakdown

Parameter	Value
Base score	7.5
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

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