CVE-2021-29921

Source

https://nvd.nist.gov/vuln/detail/CVE-2021-29921

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29921.json

Aliases

• BIT-python-2021-29921
• PSF-2021-2

Related

• ALSA-2021:4160
• ALSA-2021:4162
• RLSA-2021:4160
• RLSA-2021:4162
• USN-4973-1
• USN-4973-2

Published

2021-05-06T13:15:12Z

Modified

2023-12-06T01:01:10.043823Z

Details

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.

References

• https://bugs.python.org/issue36384
• https://docs.python.org/3/library/ipaddress.html
• https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-014.md
• https://python-security.readthedocs.io/vuln/ipaddress-ipv4-leading-zeros.html
• https://security.gentoo.org/glsa/202305-02
• https://security.netapp.com/advisory/ntap-20210622-0003/
• https://sick.codes/sick-2021-014
• https://github.com/python/cpython/pull/12577
• https://github.com/python/cpython/pull/25099
• https://www.oracle.com//security-alerts/cpujul2021.html
• https://www.oracle.com/security-alerts/cpuapr2022.html
• https://www.oracle.com/security-alerts/cpujan2022.html
• https://www.oracle.com/security-alerts/cpuoct2021.html
• https://github.com/python/cpython/blob/63298930fb531ba2bb4f23bc3b915dbf1e17e9e1/Misc/NEWS.d/3.8.0a4.rst
• https://github.com/sickcodes
• https://www.oracle.com/security-alerts/cpujul2022.html