Vulnerability · NVD
CVE-2021-29921
CRITICAL 9.8
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.
Attack vector : Network
No privileges required
No user interaction
Show raw CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
6.88%
above median
percentile 93.4%
Tracked apps referencing this CVE
For each app: the affected range, the fixing version, and where the tracked app stands today.
NVD references 6 distinct products for this CVE — only those tracked by Scout (mobile and desktop catalog apps) are listed above. Libraries, servers and out-of-scope products do not appear here. Full list on NVD ↗
Vulnerable CPE configurations (2)
| Vendor | Product | Platform | Versions | CPE 2.3 URI |
|---|---|---|---|---|
| python |
python All platforms (wildcard)
|
All platforms (wildcard) | ≥3.8.0 <3.8.12 | cpe:2.3:a:python:python:*:*:*:*:*:*:*:* |
| python |
python All platforms (wildcard)
|
All platforms (wildcard) | ≥3.9.0 <3.9.5 | cpe:2.3:a:python:python:*:*:*:*:*:*:*:* |