CVE-2021-3733
CVSS V2 Medium 4
CVSS V3 Medium 6.5
Description
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.
Overview
- CVE ID
- CVE-2021-3733
- Assigner
- secalert@redhat.com
- Vulnerability Status
- Analyzed
- Published Version
- 2022-03-10T17:42:59
- Last Modified Date
- 2022-10-26T13:35:24
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:python:python:*:*:*:*:*:*:*:* | 1 | OR | 3.6.14 | |
| cpe:2.3:a:python:python:*:*:*:*:*:*:*:* | 1 | OR | 3.7.0 | 3.7.11 |
| cpe:2.3:a:python:python:*:*:*:*:*:*:*:* | 1 | OR | 3.8.0 | 3.8.10 |
| cpe:2.3:a:python:python:*:*:*:*:*:*:*:* | 1 | OR | 3.9.0 | 3.9.5 |
| cpe:2.3:a:python:python:3.10.0:-:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:redhat:codeready_linux_builder:8.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:redhat:codeready_linux_builder_for_ibm_z_systems:8.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:redhat:codeready_linux_builder_for_power_little_endian:8.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.4:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.4:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.4:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux_server_update_services_for_sap_solutions:8.4:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:7.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:netapp:management_services_for_element_software_and_netapp_hci:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:netapp:solidfire\,_enterprise_sds_\&_hci_storage_node:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:netapp:hci_compute_node_firmware:-:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:S/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- SINGLE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 4
- Severity
- MEDIUM
- Exploitability Score
- 8
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 6.5
- Base Severity
- MEDIUM
- Exploitability Score
- 2.8
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb | Patch Third Party Advisory |
| https://ubuntu.com/security/CVE-2021-3733 | Third Party Advisory |
| https://bugs.python.org/issue43075 | Exploit Issue Tracking Patch Vendor Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=1995234 | Issue Tracking Third Party Advisory |
| https://github.com/python/cpython/pull/24391 | Patch Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20220407-0001/ |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-3733 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3733 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:29:10 | Added to TrackCVE | |||
| 2022-12-06 11:42:59 | 2022-03-10T17:42Z | 2022-03-10T17:42:59 | CVE Published Date | updated |
| 2022-12-06 11:42:59 | 2022-10-26T13:35:24 | CVE Modified Date | updated | |
| 2022-12-06 11:42:59 | Analyzed | Vulnerability Status | updated |