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CVE-2021-29921

Status Candidate

Overview

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.

Related Files

Gentoo Linux Security Advisory 202305-02
Posted May 3, 2023
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202305-2 - Multiple vulnerabilities have been found in Python and PyPy, the worst of which could result in arbitrary code execution.

tags | advisory, arbitrary, vulnerability, code execution, python
systems | linux, gentoo
advisories | CVE-2015-20107, CVE-2021-28363, CVE-2021-28861, CVE-2021-29921, CVE-2021-3654, CVE-2022-0391, CVE-2022-37454, CVE-2022-42919, CVE-2022-45061
SHA-256 | 641b7206ae708be2456ced27dc11f8f77c8d01d6eb97ee4f516c3e6799b4e0ad
Red Hat Security Advisory 2021-4160-03
Posted Nov 10, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4160-03 - Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Issues addressed include cross site scripting, denial of service, and information leakage vulnerabilities.

tags | advisory, denial of service, vulnerability, xss, python
systems | linux, redhat
advisories | CVE-2021-28957, CVE-2021-29921, CVE-2021-33503, CVE-2021-3426, CVE-2021-3572, CVE-2021-3733, CVE-2021-3737
SHA-256 | d4c975c8f0fd0283493287448972680095337bb6113fc44f4837d867665d4273
Red Hat Security Advisory 2021-4162-05
Posted Nov 10, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4162-05 - Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Issues addressed include code execution, cross site scripting, denial of service, double free, information leakage, and traversal vulnerabilities.

tags | advisory, denial of service, vulnerability, code execution, xss, python
systems | linux, redhat
advisories | CVE-2019-18874, CVE-2020-28493, CVE-2021-20095, CVE-2021-23336, CVE-2021-28957, CVE-2021-29921, CVE-2021-33503, CVE-2021-3426, CVE-2021-3572, CVE-2021-42771
SHA-256 | e213dc130fe6c0f9ceeb6dbc6201ba34dd61a302b188cea3f4e8ad9fc8057754
Ubuntu Security Notice USN-4973-2
Posted Oct 4, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4973-2 - USN-4973-1 fixed this vulnerability previously, but it was re-introduced in python3.8 in focal because of the SRU in LP: #1928057. This update fixes the problem. It was discovered that the Python stdlib ipaddress API incorrectly handled octal strings. A remote attacker could possibly use this issue to perform a wide variety of attacks, including bypassing certain access restrictions. Various other issues were also addressed.

tags | advisory, remote, python
systems | linux, ubuntu
advisories | CVE-2021-29921
SHA-256 | c196735c92f4db65e944d2ae4d93193aa693a7dcfe98671e5a7a8573a75157f3
Red Hat Security Advisory 2021-3254-01
Posted Aug 30, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3254-01 - Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Issues addressed include buffer overflow, code execution, cross site scripting, denial of service, information leakage, integer overflow, and traversal vulnerabilities.

tags | advisory, denial of service, overflow, vulnerability, code execution, xss, python
systems | linux, redhat
advisories | CVE-2020-25659, CVE-2020-27619, CVE-2020-27783, CVE-2020-28493, CVE-2020-36242, CVE-2021-20095, CVE-2021-23336, CVE-2021-28957, CVE-2021-29921, CVE-2021-3177, CVE-2021-33503, CVE-2021-3426, CVE-2021-3572
SHA-256 | f49b54d77f89082e96a8e69fc49612163d813deff1eacac5d74e788baf88efbf
Ubuntu Security Notice USN-4973-1
Posted Jun 1, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4973-1 - It was discovered that the Python stdlib ipaddress API incorrectly handled octal strings. A remote attacker could possibly use this issue to perform a wide variety of attacks, including bypassing certain access restrictions.

tags | advisory, remote, python
systems | linux, ubuntu
advisories | CVE-2021-29921
SHA-256 | c5b3ce18c04bb54f8d9cccdbd356b78d71d0e1536f4ddad6ed0d63d355b590c2
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