CVE-2021-3737

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.
Infinite Loop
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
redhatCNA
---
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 32%
VendorProductVersion
pythonpython
3.6.0 ≤
𝑥
< 3.6.14
pythonpython
3.7.0 ≤
𝑥
< 3.7.11
pythonpython
3.8.0 ≤
𝑥
< 3.8.11
pythonpython
3.9.0 ≤
𝑥
< 3.9.6
redhatcodeready_linux_builder
8.0
redhatcodeready_linux_builder_for_ibm_z_systems
8.0
redhatcodeready_linux_builder_for_power_little_endian
8.0
redhatenterprise_linux
6.0
redhatenterprise_linux
7.0
redhatenterprise_linux
8.0
redhatenterprise_linux_for_ibm_z_systems
8.0
redhatenterprise_linux_for_power_little_endian
8.0
canonicalubuntu_linux
14.04
canonicalubuntu_linux
16.04
canonicalubuntu_linux
18.04
canonicalubuntu_linux
20.04
canonicalubuntu_linux
21.04
netapphci
-
netappmanagement_services_for_element_software
-
netappnetapp_xcp_smb
-
netappontap_select_deploy_administration_utility
-
netappxcp_nfs
-
oraclecommunications_cloud_native_core_binding_support_function
22.1.3
oraclecommunications_cloud_native_core_network_exposure_function
22.1.1
oraclecommunications_cloud_native_core_policy
22.2.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
pypy3
bullseye
no-dsa
bullseye (security)
vulnerable
buster
no-dsa
bookworm
7.3.11+dfsg-2+deb12u2
fixed
sid
7.3.17+dfsg-2
fixed
trixie
7.3.17+dfsg-2
fixed
python2.7
bullseye
vulnerable
buster
no-dsa
python3.9
bullseye
vulnerable
buster
no-dsa
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
python3.10
noble
dne
mantic
dne
lunar
dne
kinetic
not-affected
jammy
not-affected
impish
not-affected
hirsute
ignored
focal
dne
bionic
dne
xenial
ignored
trusty
dne
python3.4
noble
dne
mantic
dne
lunar
dne
kinetic
dne
jammy
dne
impish
dne
hirsute
dne
focal
dne
bionic
dne
xenial
ignored
trusty
Fixed 3.4.3-1ubuntu1~14.04.7+esm11
released
python3.5
noble
dne
mantic
dne
lunar
dne
kinetic
dne
jammy
dne
impish
dne
hirsute
dne
focal
dne
bionic
dne
xenial
Fixed 3.5.2-2ubuntu0~16.04.13+esm1
released
trusty
Fixed 3.5.2-2ubuntu0~16.04.4~14.04.1+esm1
released
python3.6
noble
dne
mantic
dne
lunar
dne
kinetic
dne
jammy
dne
impish
dne
hirsute
dne
focal
dne
bionic
Fixed 3.6.9-1~18.04ubuntu1.6
released
xenial
ignored
trusty
dne
python3.7
noble
dne
mantic
dne
lunar
dne
kinetic
dne
jammy
dne
impish
dne
hirsute
dne
focal
dne
bionic
Fixed 3.7.5-2ubuntu1~18.04.2
released
xenial
ignored
trusty
dne
python3.8
noble
dne
mantic
dne
lunar
dne
kinetic
dne
jammy
dne
impish
dne
hirsute
dne
focal
Fixed 3.8.10-0ubuntu1~20.04.2
released
bionic
Fixed 3.8.0-3ubuntu1~18.04.2
released
xenial
ignored
trusty
dne
python3.9
noble
dne
mantic
dne
lunar
dne
kinetic
dne
jammy
dne
impish
not-affected
hirsute
Fixed 3.9.5-3ubuntu0~21.04.1
released
focal
Fixed 3.9.5-3ubuntu0~20.04.1
released
bionic
dne
xenial
ignored
trusty
dne