CVE-2021-33503

Source
https://nvd.nist.gov/vuln/detail/CVE-2021-33503
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-33503.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-33503
Aliases
Related
Published
2021-06-29T11:15:07Z
Modified
2024-10-12T07:38:41.022934Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

References

Affected packages

Debian:11 / python-urllib3

Package

Name
python-urllib3
Purl
pkg:deb/debian/python-urllib3?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.26.5-1~exp1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:12 / python-urllib3

Package

Name
python-urllib3
Purl
pkg:deb/debian/python-urllib3?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.26.5-1~exp1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:13 / python-urllib3

Package

Name
python-urllib3
Purl
pkg:deb/debian/python-urllib3?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.26.5-1~exp1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Git / github.com/urllib3/urllib3

Affected ranges

Type
GIT
Repo
https://github.com/urllib3/urllib3
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed

Affected versions

0.*

0.3
0.3.1
0.4
0.4.1

1.*

1.0
1.0.1
1.0.2
1.1
1.10
1.10.1
1.10.2
1.2
1.2.1
1.25
1.25.1
1.25.2
1.25.3
1.25.4
1.25.5
1.25.6
1.25.7
1.25.8
1.26.0
1.26.1
1.26.2
1.26.3
1.26.4
1.3
1.4
1.5
1.6
1.7
1.7.1
1.8
1.8.1
1.8.2
1.8.3
1.9
1.9.1