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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-29921 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://bugs.python.org/issue36384 CVE, MITRE Issue Tracking  Patch  Vendor Advisory 
https://docs.python.org/3/library/ipaddress.html CVE, MITRE Vendor Advisory 
https://github.com/python/cpython/blob/63298930fb531ba2bb4f23bc3b915dbf1e17e9e1/Misc/NEWS.d/3.8.0a4.rst CVE, MITRE Third Party Advisory 
https://github.com/python/cpython/pull/12577 CVE, MITRE Patch  Third Party Advisory 
https://github.com/python/cpython/pull/25099 CVE, MITRE Patch  Third Party Advisory 
https://github.com/sickcodes CVE, MITRE Third Party Advisory 
https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-014.md CVE, MITRE Exploit  Third Party Advisory 
https://python-security.readthedocs.io/vuln/ipaddress-ipv4-leading-zeros.html CVE, MITRE Vendor Advisory 
https://security.gentoo.org/glsa/202305-02 CVE, MITRE
https://security.netapp.com/advisory/ntap-20210622-0003/ CVE, MITRE Third Party Advisory 
https://sick.codes/sick-2021-014 CVE, MITRE Exploit  Third Party Advisory 
https://www.oracle.com//security-alerts/cpujul2021.html CVE, MITRE Patch  Third Party Advisory 
https://www.oracle.com/security-alerts/cpuapr2022.html CVE, MITRE Patch  Third Party Advisory 
https://www.oracle.com/security-alerts/cpujan2022.html CVE, MITRE Patch  Third Party Advisory 
https://www.oracle.com/security-alerts/cpujul2022.html CVE, MITRE
https://www.oracle.com/security-alerts/cpuoct2021.html CVE, MITRE Patch  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-Other Other cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

17 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-29921
NVD Published Date:
05/06/2021
NVD Last Modified:
11/21/2024
Source:
MITRE