Search criteria
78 vulnerabilities found for CPython by Python Software Foundation
CVE-2024-6923 (GCVE-0-2024-6923)
Vulnerability from cvelistv5 – Published: 2024-08-01 13:40 – Updated: 2025-11-03 22:32
VLAI?
Title
Email header injection due to unquoted newlines
Summary
There is a MEDIUM severity vulnerability affecting CPython.
The
email module didn’t properly quote newlines for email headers when
serializing an email message allowing for header injection when an email
is serialized.
Severity ?
5.5 (Medium)
CWE
- CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.8.20
(python)
Affected: 3.9.0 , < 3.9.20 (python) Affected: 3.10.0 , < 3.10.15 (python) Affected: 3.11.0 , < 3.11.10 (python) Affected: 3.12.0 , < 3.12.5 (python) Affected: 3.13.0a1 , < 3.13.0rc2 (python) |
Credits
Petr Viktorin
Seth Larson
John Whitlock
Bas Bloemsaat
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CVE-2024-3219 (GCVE-0-2024-3219)
Vulnerability from cvelistv5 – Published: 2024-07-29 21:54 – Updated: 2025-05-02 23:02
VLAI?
Title
Pure-Python fallback of socket.socketpair() doesn’t authenticate peer connection
Summary
The
“socket” module provides a pure-Python fallback to the
socket.socketpair() function for platforms that don’t support AF_UNIX,
such as Windows. This pure-Python implementation uses AF_INET or
AF_INET6 to create a local connected pair of sockets. The connection
between the two sockets was not verified before passing the two sockets
back to the user, which leaves the server socket vulnerable to a
connection race from a malicious local peer.
Platforms that support AF_UNIX such as Linux and macOS are not affected by this vulnerability. Versions prior to CPython 3.5 are not affected due to the vulnerable API not being included.
Severity ?
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.8.20
(python)
Affected: 3.9.0 , < 3.9.20 (python) Affected: 3.10.0 , < 3.10.15 (python) Affected: 3.11.0 , < 3.11.10 (python) Affected: 3.12.0 , < 3.12.5 (python) Affected: 3.13.0a1 , < 3.13.0rc1 (python) |
Credits
Ellie
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CVE-2024-5642 (GCVE-0-2024-5642)
Vulnerability from cvelistv5 – Published: 2024-06-27 21:05 – Updated: 2025-10-09 18:36
VLAI?
Title
Buffer overread when using an empty list with SSLContext.set_npn_protocols()
Summary
CPython 3.9 and earlier doesn't disallow configuring an empty list ("[]") for SSLContext.set_npn_protocols() which is an invalid value for the underlying OpenSSL API. This results in a buffer over-read when NPN is used (see CVE-2024-5535 for OpenSSL). This vulnerability is of low severity due to NPN being not widely used and specifying an empty list likely being uncommon in-practice (typically a protocol name would be configured).
Severity ?
6.5 (Medium)
Assigner
References
| URL | Tags | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.9.24
(python)
Affected: 3.10.0a1 , < 3.10.0b1 (python) |
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CVE-2024-0397 (GCVE-0-2024-0397)
Vulnerability from cvelistv5 – Published: 2024-06-17 15:09 – Updated: 2025-11-03 21:50
VLAI?
Title
Memory race condition in ssl.SSLContext certificate store methods
Summary
A defect was discovered in the Python “ssl” module where there is a memory
race condition with the ssl.SSLContext methods “cert_store_stats()” and
“get_ca_certs()”. The race condition can be triggered if the methods are
called at the same time as certificates are loaded into the SSLContext,
such as during the TLS handshake with a certificate directory configured.
This issue is fixed in CPython 3.10.14, 3.11.9, 3.12.3, and 3.13.0a5.
Severity ?
7.4 (High)
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.8.20
(python)
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CVE-2024-4032 (GCVE-0-2024-4032)
Vulnerability from cvelistv5 – Published: 2024-06-17 15:05 – Updated: 2025-11-03 21:57
VLAI?
Title
Incorrect IPv4 and IPv6 private ranges
Summary
The “ipaddress” module contained incorrect information about whether certain IPv4 and IPv6 addresses were designated as “globally reachable” or “private”. This affected the is_private and is_global properties of the ipaddress.IPv4Address, ipaddress.IPv4Network, ipaddress.IPv6Address, and ipaddress.IPv6Network classes, where values wouldn’t be returned in accordance with the latest information from the IANA Special-Purpose Address Registries.
CPython 3.12.4 and 3.13.0a6 contain updated information from these registries and thus have the intended behavior.
Severity ?
7.5 (High)
CWE
- CWE-697 - Incorrect Comparison
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||||||||
Impacted products
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|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
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(python)
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CVE-2024-4030 (GCVE-0-2024-4030)
Vulnerability from cvelistv5 – Published: 2024-05-07 21:02 – Updated: 2024-09-07 02:44
VLAI?
Title
tempfile.mkdtemp() may be readable and writeable by all users on Windows
Summary
On Windows a directory returned by tempfile.mkdtemp() would not always have permissions set to restrict reading and writing to the temporary directory by other users, instead usually inheriting the correct permissions from the default location. Alternate configurations or users without a profile directory may not have the intended permissions.
If you’re not using Windows or haven’t changed the temporary directory location then you aren’t affected by this vulnerability. On other platforms the returned directory is consistently readable and writable only by the current user.
This issue was caused by Python not supporting Unix permissions on Windows. The fix adds support for Unix “700” for the mkdir function on Windows which is used by mkdtemp() to ensure the newly created directory has the proper permissions.
Severity ?
7.1 (High)
CWE
- CWE-276 - Incorrect Default Permissions
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.8.20
(python)
Affected: 3.9.0 , < 3.9.20 (python) Affected: 3.10.0 , < 3.10.15 (python) Affected: 3.11.0 , < 3.11.10 (python) Affected: 3.12.0 , < 3.12.4 (python) Affected: 3.13.0a1 , < 3.13.0b1 (python) |
Credits
Aobo Wang
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CVE-2023-6597 (GCVE-0-2023-6597)
Vulnerability from cvelistv5 – Published: 2024-03-19 15:44 – Updated: 2025-11-03 21:50
VLAI?
Summary
An issue was found in the CPython `tempfile.TemporaryDirectory` class affecting versions 3.12.1, 3.11.7, 3.10.13, 3.9.18, and 3.8.18 and prior.
The tempfile.TemporaryDirectory class would dereference symlinks during cleanup of permissions-related errors. This means users which can run privileged programs are potentially able to modify permissions of files referenced by symlinks in some circumstances.
Severity ?
7.8 (High)
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.8.19
(python)
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CVE-2024-0450 (GCVE-0-2024-0450)
Vulnerability from cvelistv5 – Published: 2024-03-19 15:12 – Updated: 2025-11-03 21:50
VLAI?
Title
Quoted zip-bomb protection for zipfile
Summary
An issue was found in the CPython `zipfile` module affecting versions 3.12.1, 3.11.7, 3.10.13, 3.9.18, and 3.8.18 and prior.
The zipfile module is vulnerable to “quoted-overlap” zip-bombs which exploit the zip format to create a zip-bomb with a high compression ratio. The fixed versions of CPython makes the zipfile module reject zip archives which overlap entries in the archive.
Severity ?
6.2 (Medium)
CWE
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.8.19
(python)
Affected: 3.9.0 , < 3.9.19 (python) Affected: 3.10.0 , < 3.10.14 (python) Affected: 3.11.0 , < 3.11.8 (python) Affected: 3.12.0 , < 3.12.2 (python) Affected: 3.13.0a1 , < 3.13.0a3 (python) |
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CVE-2023-6507 (GCVE-0-2023-6507)
Vulnerability from cvelistv5 – Published: 2023-12-08 18:20 – Updated: 2024-08-02 08:35
VLAI?
Title
Groups not dropped before running subprocess when using empty 'extra_groups' parameter
Summary
An issue was found in CPython 3.12.0 `subprocess` module on POSIX platforms. The issue was fixed in CPython 3.12.1 and does not affect other stable releases.
When using the `extra_groups=` parameter with an empty list as a value (ie `extra_groups=[]`) the logic regressed to not call `setgroups(0, NULL)` before calling `exec()`, thus not dropping the original processes' groups before starting the new process. There is no issue when the parameter isn't used or when any value is used besides an empty list.
This issue only impacts CPython processes run with sufficient privilege to make the `setgroups` system call (typically `root`).
Severity ?
6.1 (Medium)
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
3.12.0 , < 3.12.1
(python)
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CVE-2024-6923 (GCVE-0-2024-6923)
Vulnerability from nvd – Published: 2024-08-01 13:40 – Updated: 2025-11-03 22:32
VLAI?
Title
Email header injection due to unquoted newlines
Summary
There is a MEDIUM severity vulnerability affecting CPython.
The
email module didn’t properly quote newlines for email headers when
serializing an email message allowing for header injection when an email
is serialized.
Severity ?
5.5 (Medium)
CWE
- CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.8.20
(python)
Affected: 3.9.0 , < 3.9.20 (python) Affected: 3.10.0 , < 3.10.15 (python) Affected: 3.11.0 , < 3.11.10 (python) Affected: 3.12.0 , < 3.12.5 (python) Affected: 3.13.0a1 , < 3.13.0rc2 (python) |
Credits
Petr Viktorin
Seth Larson
John Whitlock
Bas Bloemsaat
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CVE-2024-3219 (GCVE-0-2024-3219)
Vulnerability from nvd – Published: 2024-07-29 21:54 – Updated: 2025-05-02 23:02
VLAI?
Title
Pure-Python fallback of socket.socketpair() doesn’t authenticate peer connection
Summary
The
“socket” module provides a pure-Python fallback to the
socket.socketpair() function for platforms that don’t support AF_UNIX,
such as Windows. This pure-Python implementation uses AF_INET or
AF_INET6 to create a local connected pair of sockets. The connection
between the two sockets was not verified before passing the two sockets
back to the user, which leaves the server socket vulnerable to a
connection race from a malicious local peer.
Platforms that support AF_UNIX such as Linux and macOS are not affected by this vulnerability. Versions prior to CPython 3.5 are not affected due to the vulnerable API not being included.
Severity ?
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.8.20
(python)
Affected: 3.9.0 , < 3.9.20 (python) Affected: 3.10.0 , < 3.10.15 (python) Affected: 3.11.0 , < 3.11.10 (python) Affected: 3.12.0 , < 3.12.5 (python) Affected: 3.13.0a1 , < 3.13.0rc1 (python) |
Credits
Ellie
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CVE-2024-5642 (GCVE-0-2024-5642)
Vulnerability from nvd – Published: 2024-06-27 21:05 – Updated: 2025-10-09 18:36
VLAI?
Title
Buffer overread when using an empty list with SSLContext.set_npn_protocols()
Summary
CPython 3.9 and earlier doesn't disallow configuring an empty list ("[]") for SSLContext.set_npn_protocols() which is an invalid value for the underlying OpenSSL API. This results in a buffer over-read when NPN is used (see CVE-2024-5535 for OpenSSL). This vulnerability is of low severity due to NPN being not widely used and specifying an empty list likely being uncommon in-practice (typically a protocol name would be configured).
Severity ?
6.5 (Medium)
Assigner
References
| URL | Tags | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.9.24
(python)
Affected: 3.10.0a1 , < 3.10.0b1 (python) |
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CVE-2024-0397 (GCVE-0-2024-0397)
Vulnerability from nvd – Published: 2024-06-17 15:09 – Updated: 2025-11-03 21:50
VLAI?
Title
Memory race condition in ssl.SSLContext certificate store methods
Summary
A defect was discovered in the Python “ssl” module where there is a memory
race condition with the ssl.SSLContext methods “cert_store_stats()” and
“get_ca_certs()”. The race condition can be triggered if the methods are
called at the same time as certificates are loaded into the SSLContext,
such as during the TLS handshake with a certificate directory configured.
This issue is fixed in CPython 3.10.14, 3.11.9, 3.12.3, and 3.13.0a5.
Severity ?
7.4 (High)
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||
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| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.8.20
(python)
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CVE-2024-4032 (GCVE-0-2024-4032)
Vulnerability from nvd – Published: 2024-06-17 15:05 – Updated: 2025-11-03 21:57
VLAI?
Title
Incorrect IPv4 and IPv6 private ranges
Summary
The “ipaddress” module contained incorrect information about whether certain IPv4 and IPv6 addresses were designated as “globally reachable” or “private”. This affected the is_private and is_global properties of the ipaddress.IPv4Address, ipaddress.IPv4Network, ipaddress.IPv6Address, and ipaddress.IPv6Network classes, where values wouldn’t be returned in accordance with the latest information from the IANA Special-Purpose Address Registries.
CPython 3.12.4 and 3.13.0a6 contain updated information from these registries and thus have the intended behavior.
Severity ?
7.5 (High)
CWE
- CWE-697 - Incorrect Comparison
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.8.20
(python)
Affected: 3.9.0 , < 3.9.20 (python) Affected: 3.10.0 , < 3.10.15 (python) Affected: 3.11.0 , < 3.11.10 (python) Affected: 3.12.0 , < 3.12.4 (python) Affected: 3.13.0a1 , < 3.13.0a6 (python) |
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CVE-2024-4030 (GCVE-0-2024-4030)
Vulnerability from nvd – Published: 2024-05-07 21:02 – Updated: 2024-09-07 02:44
VLAI?
Title
tempfile.mkdtemp() may be readable and writeable by all users on Windows
Summary
On Windows a directory returned by tempfile.mkdtemp() would not always have permissions set to restrict reading and writing to the temporary directory by other users, instead usually inheriting the correct permissions from the default location. Alternate configurations or users without a profile directory may not have the intended permissions.
If you’re not using Windows or haven’t changed the temporary directory location then you aren’t affected by this vulnerability. On other platforms the returned directory is consistently readable and writable only by the current user.
This issue was caused by Python not supporting Unix permissions on Windows. The fix adds support for Unix “700” for the mkdir function on Windows which is used by mkdtemp() to ensure the newly created directory has the proper permissions.
Severity ?
7.1 (High)
CWE
- CWE-276 - Incorrect Default Permissions
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.8.20
(python)
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Credits
Aobo Wang
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CVE-2023-6597 (GCVE-0-2023-6597)
Vulnerability from nvd – Published: 2024-03-19 15:44 – Updated: 2025-11-03 21:50
VLAI?
Summary
An issue was found in the CPython `tempfile.TemporaryDirectory` class affecting versions 3.12.1, 3.11.7, 3.10.13, 3.9.18, and 3.8.18 and prior.
The tempfile.TemporaryDirectory class would dereference symlinks during cleanup of permissions-related errors. This means users which can run privileged programs are potentially able to modify permissions of files referenced by symlinks in some circumstances.
Severity ?
7.8 (High)
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.8.19
(python)
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CVE-2024-0450 (GCVE-0-2024-0450)
Vulnerability from nvd – Published: 2024-03-19 15:12 – Updated: 2025-11-03 21:50
VLAI?
Title
Quoted zip-bomb protection for zipfile
Summary
An issue was found in the CPython `zipfile` module affecting versions 3.12.1, 3.11.7, 3.10.13, 3.9.18, and 3.8.18 and prior.
The zipfile module is vulnerable to “quoted-overlap” zip-bombs which exploit the zip format to create a zip-bomb with a high compression ratio. The fixed versions of CPython makes the zipfile module reject zip archives which overlap entries in the archive.
Severity ?
6.2 (Medium)
CWE
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.8.19
(python)
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CVE-2023-6507 (GCVE-0-2023-6507)
Vulnerability from nvd – Published: 2023-12-08 18:20 – Updated: 2024-08-02 08:35
VLAI?
Title
Groups not dropped before running subprocess when using empty 'extra_groups' parameter
Summary
An issue was found in CPython 3.12.0 `subprocess` module on POSIX platforms. The issue was fixed in CPython 3.12.1 and does not affect other stable releases.
When using the `extra_groups=` parameter with an empty list as a value (ie `extra_groups=[]`) the logic regressed to not call `setgroups(0, NULL)` before calling `exec()`, thus not dropping the original processes' groups before starting the new process. There is no issue when the parameter isn't used or when any value is used besides an empty list.
This issue only impacts CPython processes run with sufficient privilege to make the `setgroups` system call (typically `root`).
Severity ?
6.1 (Medium)
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
3.12.0 , < 3.12.1
(python)
Affected: 3.13.0a1 , < 3.13.0a3 (python) |
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