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[email protected]NVD:CVE-2021-33503

HistoryJun 29, 2021 - 11:15 a.m.

CVE-2021-33503

2021-06-2911:15:07

CWE-400

[email protected]

web.nvd.nist.gov

urllib3

catastrophic backtracking

denial of service

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

CVSS3

7.5

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

EPSS

0.003

Percentile

69.2%

JSON

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.

Affected configurations

Nvd

Node

pythonurllib3Range1.25.4–1.26.5

Node

fedoraprojectfedoraMatch33

fedoraprojectfedoraMatch34

Node

oracleenterprise_manager_ops_centerMatch12.4.0.0

oracleinstantis_enterprisetrackMatch17.1

oracleinstantis_enterprisetrackMatch17.2

oracleinstantis_enterprisetrackMatch17.3

oraclezfs_storage_appliance_kitMatch8.8

VendorProductVersionCPE
pythonurllib3*cpe:2.3:a:python:urllib3:*:*:*:*:*:*:*:*
fedoraprojectfedora33cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
fedoraprojectfedora34cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
oracleenterprise_manager_ops_center12.4.0.0cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0:*:*:*:*:*:*:*
oracleinstantis_enterprisetrack17.1cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*
oracleinstantis_enterprisetrack17.2cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*
oracleinstantis_enterprisetrack17.3cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*
oraclezfs_storage_appliance_kit8.8cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
python	urllib3	*	cpe:2.3:a:python:urllib3::::::::
fedoraproject	fedora	33	cpe:2.3:o:fedoraproject:fedora:33:::::::*
fedoraproject	fedora	34	cpe:2.3:o:fedoraproject:fedora:34:::::::*
oracle	enterprise_manager_ops_center	12.4.0.0	cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0:::::::*
oracle	instantis_enterprisetrack	17.1	cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:::::::*
oracle	instantis_enterprisetrack	17.2	cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:::::::*
oracle	instantis_enterprisetrack	17.3	cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:::::::*
oracle	zfs_storage_appliance_kit	8.8	cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:::::::*