Debian Security Bug TrackerDEBIANCVE:CVE-2021-3733CVE-2021-3733
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
71.6%
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.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Debian | 12 | all | pypy3 | < 7.3.8+dfsg-1 | pypy3_7.3.8+dfsg-1_all.deb |
| Debian | 11 | all | pypy3 | <= 7.3.5+dfsg-2+deb11u2 | pypy3_7.3.5+dfsg-2+deb11u2_all.deb |
| Debian | 999 | all | pypy3 | < 7.3.8+dfsg-1 | pypy3_7.3.8+dfsg-1_all.deb |
| Debian | 13 | all | pypy3 | < 7.3.8+dfsg-1 | pypy3_7.3.8+dfsg-1_all.deb |
| Debian | 11 | all | python2.7 | <= 2.7.18-8+deb11u1 | python2.7_2.7.18-8+deb11u1_all.deb |
| Debian | 11 | all | python3.9 | <= 3.9.2-1 | python3.9_3.9.2-1_all.deb |
Related
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
71.6%