Vulnerabilities > CVE-2021-29921
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
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.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | Python
| 56 |
| Application | 6 |
References
- https://github.com/python/cpython/pull/25099
- https://sick.codes/sick-2021-014
- https://python-security.readthedocs.io/vuln/ipaddress-ipv4-leading-zeros.html
- https://github.com/sickcodes
- https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-014.md
- https://github.com/python/cpython/pull/12577
- https://docs.python.org/3/library/ipaddress.html
- https://github.com/python/cpython/blob/63298930fb531ba2bb4f23bc3b915dbf1e17e9e1/Misc/NEWS.d/3.8.0a4.rst
- https://bugs.python.org/issue36384
- https://security.netapp.com/advisory/ntap-20210622-0003/
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://security.gentoo.org/glsa/202305-02