CVE-2021-3733
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Python
PublishedMar 10, 2022
First seenMar 10, 2022
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- python python3.6.14, 3.7.11, 3.8.10, 3.9.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| python python | v < 3.6.14, 3.7.0 ≤ v < 3.7.11, 3.8.0 ≤ v < 3.8.10, 3.9.0 ≤ v < 3.9.5, 3.10.0 | 3.6.14, 3.7.11, 3.8.10, 3.9.5 |
| redhat codeready_linux_builder | 8.0 | — |
| redhat codeready_linux_builder_for_ibm_z_systems | 8.0 | — |
| redhat codeready_linux_builder_for_power_little_endian | 8.0 | — |
| redhat enterprise_linux | 8.0 | — |
| redhat enterprise_linux_eus | 8.4 | — |
| redhat enterprise_linux_for_ibm_z_systems | 8.0 | — |
| redhat enterprise_linux_for_ibm_z_systems_eus | 8.4 | — |
| redhat enterprise_linux_for_power_little_endian | 8.0 | — |
| redhat enterprise_linux_for_power_little_endian_eus | 8.4 | — |
| redhat enterprise_linux_server_aus | 8.4 | — |
| redhat enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions | 8.4 | — |
| redhat enterprise_linux_server_tus | 8.4 | — |
| redhat enterprise_linux_server_update_services_for_sap_solutions | 8.4 | — |
| fedoraproject extra_packages_for_enterprise_linux | 7.0 | — |
| fedoraproject fedora | 33, 34, 35, 36 | — |
| netapp management_services_for_element_software_and_netapp_hci | No range specified | — |
| netapp ontap_select_deploy_administration_utility | No range specified | — |
| netapp solidfire\,_enterprise_sds_\&_hci_storage_node | No range specified | — |
| netapp hci_compute_node_firmware | No range specified | — |
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