Debian Security Bug TrackerDEBIANCVE:CVE-2021-33503CVE-2021-33503
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.003 Low
EPSS
Percentile
69.2%
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.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Debian | 12 | all | python-urllib3 | < 1.26.5-1~exp1 | python-urllib3_1.26.5-1~exp1_all.deb |
| Debian | 11 | all | python-urllib3 | < 1.26.5-1~exp1 | python-urllib3_1.26.5-1~exp1_all.deb |
| Debian | 10 | all | python-urllib3 | < 1.24.1-1 | python-urllib3_1.24.1-1_all.deb |
| Debian | 999 | all | python-urllib3 | < 1.26.5-1~exp1 | python-urllib3_1.26.5-1~exp1_all.deb |
| Debian | 13 | all | python-urllib3 | < 1.26.5-1~exp1 | python-urllib3_1.26.5-1~exp1_all.deb |
Related
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.003 Low
EPSS
Percentile
69.2%