CVE-2021-29921
Critical
Description
In Python before 3,9,5, the ipaddress library mishandles leading zero characters in the octets of an IP address string. This (in some situations) allows attackers to bypass access control that is based on IP addresses.
SeverityCritical
CVSS9.8
Exploit probability94. percentile6.8%
Product
Python
PublishedMay 6, 2021
First seenMay 6, 2021
How to fix
Update
- python python3.8.12, 3.9.5 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| python python | 3.8.0 ≤ v < 3.8.12, 3.9.0 ≤ v < 3.9.5 | 3.8.12, 3.9.5 |
| oracle communications_cloud_native_core_automated_test_suite | 1.8.0 | — |
| oracle communications_cloud_native_core_binding_support_function | 1.11.0 | — |
| oracle communications_cloud_native_core_network_slice_selection_function | 1.8.0 | — |
| oracle graalvm | 20.3.2, 21.1.0 | — |
| oracle zfs_storage_appliance_kit | 8.8 | — |
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