CVE-2021-40839

2021-09-1000:00:00

ubuntu.com

python

rencode package

infinite loop

typecode decoding

remote attack

cpu

memory

unix

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.004

Percentile

74.7%

JSON

The rencode package through 1.0.6 for Python allows an infinite loop in
typecode decoding (such as via ;\x2f\x7f), enabling a remote attack that
consumes CPU and memory.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchpython-rencode< anyUNKNOWN
ubuntu20.04noarchpython-rencode< anyUNKNOWN
ubuntu22.04noarchpython-rencode< anyUNKNOWN
ubuntu16.04noarchpython-rencode< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	python-rencode	< any	UNKNOWN
ubuntu	20.04	noarch	python-rencode	< any	UNKNOWN
ubuntu	22.04	noarch	python-rencode	< any	UNKNOWN
ubuntu	16.04	noarch	python-rencode	< any	UNKNOWN