DEBIAN-CVE-2021-3733

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Source
https://security-tracker.debian.org/tracker/DEBIAN-CVE-2021-3733
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-3733.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2021-3733
Upstream
Published
2022-03-10T17:42:59Z
Modified
2025-09-19T07:31:43.346958Z
Summary
[none]
Details

There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.

References

Affected packages

Debian:11 / pypy3

Package

Name
pypy3
Purl
pkg:deb/debian/pypy3?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
7.3.5+dfsg-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / pypy3

Package

Name
pypy3
Purl
pkg:deb/debian/pypy3?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
7.3.5+dfsg-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / pypy3

Package

Name
pypy3
Purl
pkg:deb/debian/pypy3?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
7.3.5+dfsg-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / pypy3

Package

Name
pypy3
Purl
pkg:deb/debian/pypy3?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
7.3.5+dfsg-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:11 / python3.9

Package

Name
python3.9
Purl
pkg:deb/debian/python3.9?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.9.2-1+deb11u2

Affected versions

3.*

3.9.2-1
3.9.2-1+deb11u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}