End of life: 10/31/2031, End of support: 10/9/2028, Latest version: 3.15.0

Summary

In the fallback extraction path for source distributions, pip used Python’s tarfile module without verifying that symbolic/hard link targets resolve inside the intended extraction directory. A malicious sdist can include links that escape the target directory and overwrite arbitrary files on the invoking host during pip install.

Impact

Successful exploitation enables arbitrary file overwrite outside the build/extraction directory on the machine running pip. This can be leveraged to tamper with configuration or startup files and may lead to further code execution depending on the environment, but the direct, guaranteed impact is integrity compromise on the vulnerable system.

Conditions

The issue is triggered when installing an attacker-controlled sdist (e.g., from an index or URL) and the fallback extraction code path is used. No special privileges are required beyond running pip install; active user action is necessary.

Remediation

The fix, while available as a patch that can be manually applied, has not yet been put into a numbered version but is planned for 25.3. Using a Python interpreter that implements the safe-extraction behavior described by PEP 706 provides additional defense in depth for other tarfile issues but is not a substitute for upgrading pip for this specific flaw.

Out-of-memory when loading Plist

Potential DoS via quadratic complexity in unicodedata.normalize()

Last updated 24 March 2025

The "profiling.sampling" module (Python 3.15+) and "asyncio introspection capabilities" (3.14+, "python -m asyncio ps" and "python -m asyncio pstree") features could be used to read and write addresses in a privileged process if that process connected to a malicious or "infected" Python process via the remote debugging feature. This vulnerability requires persistently and repeatedly connecting to the process to be exploited, even after the connecting process crashes with high likelihood due to ASLR.

A flaw was found in the Python tarfile module. Extracting a crafted TAR archive with the tarfile.extract or tarfile.extractall functions could lead to a directory traversal vulnerability, resulting in overwrite of arbitrary files.

Buffer overflow in the repr function in Python 2.3 through 2.6 before 20060822 allows context-dependent attackers to cause a denial of service and possibly execute arbitrary code via crafted wide character UTF-32/UCS-4 strings to certain scripts.

End of life: 10/31/2030, End of support: 10/1/2027, Latest version: 3.14.8

End of life: 10/31/2027, End of support: 4/1/2024, Latest version: 3.11.17

End of life: 10/31/2027, End of support: 4/1/2024, Latest version: 3.11.17

End of life: 10/31/2029, End of support: 10/1/2026, Latest version: 3.13.16

End of life: 10/31/2029, End of support: 10/1/2026, Latest version: 3.13.16

os.execvpe from os.py in Python 2.2.1 and earlier creates temporary files with predictable names, which could allow local users to execute arbitrary code via a symlink attack.

Buffer overflow in the getaddrinfo function in Python 2.2 before 2.2.2, when IPv6 support is disabled, allows remote attackers to execute arbitrary code via an IPv6 address that is obtained using DNS.

The SimpleXMLRPCServer library module in Python 2.2, 2.3 before 2.3.5, and 2.4, when used by XML-RPC servers that use the registerinstance method to register an object without a dispatch method, allows remote attackers to read or modify globals of the associated module, and possibly execute arbitrary code, via dotted attributes.

Stack-based buffer overflow in Python 2.4.2 and earlier, running on Linux 2.6.12.5 under gcc 4.0.3 with libc 2.3.5, allows local users to cause a "stack overflow," and possibly gain privileges, by running a script from a current working directory that has a long name, related to the realpath function. NOTE: this might not be a vulnerability. However, the fact that it appears in a programming language interpreter could mean that some applications are affected, although attack scenarios might be limited because the attacker might already need to cross privilege boundaries to cause an exploitable program to be placed in a directory with a long name; or, depending on the method that Python uses to determine the current working directory, setuid applications might be affected.

Multiple integer overflows in the imageop module in Python 2.5.1 and earlier allow context-dependent attackers to cause a denial of service (application crash) and possibly obtain sensitive information (memory contents) via crafted arguments to (1) the tovideo method, and unspecified other vectors related to (2) imageop.c, (3) rbgimgmodule.c, and other files, which trigger heap-based buffer overflows.

Off-by-one error in the PyLocalestrxfrm function in Modules/localemodule.c for Python 2.4 and 2.5 causes an incorrect buffer size to be used for the strxfrm function, which allows context-dependent attackers to read portions of memory via unknown manipulations that trigger a buffer over-read due to missing null termination.

Stack-based buffer overflow in the filecompress function in minigzip (Modules/zlib) in Python 2.5 allows context-dependent attackers to execute arbitrary code via a long file argument.

It was discovered that Python incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2015-20107) It was discovered that Python incorrectly used regular expressions vulnerable to catastrophic backtracking. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2018-1060, CVE-2018-1061) It was discovered that Python failed to initialize Expat’s hash salt. A remote attacker could possibly use this issue to cause hash collisions, leading to a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2018-14647) It was discovered that Python incorrectly handled certain pickle files. An attacker could possibly use this issue to consume memory, leading to a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2018-20406) It was discovered that Python incorrectly validated the domain when handling cookies. An attacker could possibly trick Python into sending cookies to the wrong domain. This issue only affected Ubuntu 14.04 LTS. (CVE-2018-20852) Jonathan Birch and Panayiotis Panayiotou discovered that Python incorrectly handled Unicode encoding during NFKC normalization. An attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 14.04 LTS. (CVE-2019-9636, CVE-2019-10160) It was discovered that Python incorrectly parsed certain email addresses. A remote attacker could possibly use this issue to trick Python applications into accepting email addresses that should be denied. This issue only affected Ubuntu 14.04 LTS. (CVE-2019-16056) It was discovered that the Python documentation XML-RPC server incorrectly handled certain fields. A remote attacker could use this issue to execute a cross-site scripting (XSS) attack. This issue only affected Ubuntu 14.04 LTS. (CVE-2019-16935) It was discovered that Python documentation had a misleading information. A security issue could be possibly caused by wrong assumptions of this information. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-17514) It was discovered that Python incorrectly stripped certain characters from requests. A remote attacker could use this issue to perform CRLF injection. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-18348) It was discovered that Python incorrectly handled certain TAR archives. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-20907) Colin Read and Nicolas Edet discovered that Python incorrectly handled parsing certain X509 certificates. An attacker could possibly use this issue to cause Python to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2019-5010) It was discovered that incorrectly handled certain ZIP files. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2019-9674) It was discovered that Python incorrectly handled certain urls. A remote attacker could possibly use this issue to perform CRLF injection attacks. This issue only affected Ubuntu 14.04 LTS. (CVE-2019-9740, CVE-2019-9947) Sihoon Lee discovered that Python incorrectly handled the localfile: scheme. A remote attacker could possibly use this issue to bypass blocklist meschanisms. This issue only affected Ubuntu 14.04 LTS. (CVE-2019-9948) It was discovered that Python incorrectly handled certain IP values. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2020-14422) It was discovered that Python incorrectly handled certain character sequences. A remote attacker could possibly use this issue to perform CRLF injection. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2020-26116) It was discovered that Python incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code or cause a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-27619, CVE-2021-3177) It was discovered that Python incorrectly handled certain HTTP requests. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-8492) 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. This issue only affected Ubuntu 18.04 LTS. (CVE-2021-29921) David Schwörer discovered that Python incorrectly handled certain inputs. An attacker could possibly use this issue to expose sensitive information. This issue only affected Ubuntu 18.04 LTS. (CVE-2021-3426) It was discovered that Python incorrectly handled certain RFCs. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2021-3733) It was discovered that Python incorrectly handled certain server responses. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2021-3737) It was discovered that Python incorrectly handled certain FTP requests. An attacker could possibly use this issue to expose sensitive information. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2021-4189) It was discovered that Python incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2022-0391) Devin Jeanpierre discovered that Python incorrectly handled sockets when the multiprocessing module was being used. A local attacker could possibly use this issue to execute arbitrary code and escalate privileges. This issue only affected Ubuntu 22.04 LTS. (CVE-2022-42919) It was discovered that Python incorrectly handled certain inputs. If a user or an automated system were tricked into running a specially crafted input, a remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 18.04 LTS and Ubuntu 22.04 LTS. (CVE-2022-45061, CVE-2023-24329) It was discovered that Python incorrectly handled certain scripts. An attacker could possibly use this issue to execute arbitrary code or cause a crash. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2022-48560) It was discovered that Python incorrectly handled certain plist files. If a user or an automated system were tricked into processing a specially crafted plist file, an attacker could possibly use this issue to consume resources, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2022-48564) It was discovered that Python did not properly handle XML entity declarations in plist files. An attacker could possibly use this vulnerability to perform an XML External Entity (XXE) injection, resulting in a denial of service or information disclosure. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2022-48565) It was discovered that Python did not properly provide constant-time processing for a crypto operation. An attacker could possibly use this issue to perform a timing attack and recover sensitive information. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2022-48566) It was discovered that Python instances of ssl.SSLSocket were vulnerable to a bypass of the TLS handshake. An attacker could possibly use this issue to cause applications to treat unauthenticated received data before TLS handshake as authenticated data after TLS handshake. This issue only affected Ubuntu 14.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2023-40217) It was discovered that Python incorrectly handled null bytes when normalizing pathnames. An attacker could possibly use this issue to bypass certain filename checks. This issue only affected Ubuntu 22.04 LTS. (CVE-2023-41105) It was discovered that Python incorrectly handled privilege with certain parameters. An attacker could possibly use this issue to maintain the original processes' groups before starting the new process. This issue only affected Ubuntu 23.10. (CVE-2023-6507) It was discovered that Python incorrectly handled symlinks in temp files. An attacker could possibly use this issue to modify the permissions of files. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu 23.10. (CVE-2023-6597) It was discovered that Python incorrectly handled certain crafted zip files. An attacker could possibly use this issue to crash the program, resulting in a denial of service. (CVE-2024-0450)

End of life: 10/31/2028, End of support: 4/2/2025, Latest version: 3.12.15

End of life: 10/31/2028, End of support: 4/2/2025, Latest version: 3.12.15

It was discovered that Python incorrectly handled certain scripts. An attacker could possibly use this issue to execute arbitrary code or cause a crash.

Yebo Cao discovered that Python incorrectly handled certain URLs. An attacker could use this issue to bypass blockinglisting methods. This issue was first addressed in USN-5960-1, but was incomplete. Here we address an additional fix to that issue. (CVE-2023-24329)

Yebo Cao discovered that Python incorrectly handled certain URLs. An attacker could possibly use this issue to bypass blocklisting methods by supplying a URL that starts with blank characters.

It was discovered that Python incorrectly handled certain inputs. If a user or an automated system were tricked into opening a specially crafted input file, a remote attacker could possibly use this issue to execute arbitrary code. (CVE-2015-20107) Hamza Avvan discovered that Python incorrectly handled certain inputs. If a user or an automated system were tricked into running a specially crafted input, a remote attacker could possibly use this issue to execute arbitrary code. (CVE-2021-28861) It was discovered that Python incorrectly handled certain inputs. If a user or an automated system were tricked into running a specially crafted input, a remote attacker could possibly use this issue to execute arbitrary code. (CVE-2022-37454, CVE-2022-42919) It was discovered that Python incorrectly handled certain inputs. If a user or an automated system were tricked into running a specially crafted input, a remote attacker could possibly use this issue to cause a denial of service. (CVE-2022-45061, CVE-2023-24329)

It was discovered that the Python urllib http client could enter into an infinite loop when incorrectly handling certain server responses (100 Continue response). Specially crafted traffic from a malicious HTTP server could cause a denial of service (Dos) condition for a client.

End of life: 10/1/2026, End of support: 4/5/2023, Latest version: 3.10.22

End of life: 10/1/2026, End of support: 4/5/2023, Latest version: 3.10.22