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
Status
Package | Release | Status |
---|---|---|
python3.10 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
hirsute |
Ignored
(reached end-of-life)
|
|
impish |
Not vulnerable
|
|
jammy |
Not vulnerable
|
|
kinetic |
Not vulnerable
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Ignored
(out of standard support)
|
|
python3.4 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
trusty |
Released
(3.4.3-1ubuntu1~14.04.7+esm11)
|
|
upstream |
Needs triage
|
|
xenial |
Ignored
(out of standard support)
|
|
python3.5 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
trusty |
Needed
|
|
upstream |
Needs triage
|
|
xenial |
Released
(3.5.2-2ubuntu0~16.04.13+esm1)
|
|
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
|
|
kinetic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Ignored
(out of standard support)
|
|
python3.7 Launchpad, Ubuntu, Debian |
bionic |
Released
(3.7.5-2ubuntu1~18.04.2)
|
focal |
Does not exist
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Ignored
(out of standard support)
|
|
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
|
|
kinetic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Ignored
(out of standard support)
|
|
python3.9 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Released
(3.9.5-3ubuntu0~20.04.1)
|
|
hirsute |
Released
(3.9.5-3ubuntu0~21.04.1)
|
|
impish |
Not vulnerable
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Ignored
(out of standard support)
|
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
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3737
- https://bugs.python.org/issue44022
- https://github.com/python/cpython/pull/25916
- https://github.com/python/cpython/pull/26503
- https://github.com/python/cpython/commit/60ba0b68470a584103e28958d91e93a6db37ec92 (v3.10.0b2)
- https://github.com/python/cpython/commit/ea9327036680acc92d9f89eaf6f6a54d2f8d78d9 (v3.9.6)
- https://github.com/python/cpython/commit/f396864ddfe914531b5856d7bf852808ebfc01ae (v3.8.11)
- https://github.com/python/cpython/commit/078b146f062d212919d0ba25e34e658a8234aa63 (v3.7.11)
- https://github.com/python/cpython/commit/f68d2d69f1da56c2aea1293ecf93ab69a6010ad7 (v3.6.14)
- https://github.com/python/cpython/commit/98e5a7975d99b58d511f171816ecdfb13d5cca18 (v3.10.0b3)
- https://github.com/python/cpython/commit/5df4abd6b033a5f1e48945c6988b45e35e76f647 (v3.9.6)
- https://github.com/python/cpython/commit/0389426fa4af4dfc8b1d7f3f291932d928392d8b (3.8 branch)
- https://github.com/python/cpython/commit/fee96422e6f0056561cf74fef2012cc066c9db86 (v3.7.11)
- https://github.com/python/cpython/commit/1b6f4e5e13ebd1f957b47f7415b53d0869bdbac6 (v3.6.14
- https://ubuntu.com/security/notices/USN-5083-1
- https://ubuntu.com/security/notices/USN-5199-1
- https://ubuntu.com/security/notices/USN-5200-1
- https://ubuntu.com/security/notices/USN-5201-1
- NVD
- Launchpad
- Debian