WARNING: MAJOR (BREAKING) CHANGE: Update dependency Werkzeug to v3 [SECURITY] (master) #1738
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This PR contains the following updates:
==2.2.3->==3.0.6GitHub Vulnerability Alerts
CVE-2023-46136
Werkzeug multipart data parser needs to find a boundary that may be between consecutive chunks. That's why parsing is based on looking for newline characters. Unfortunately, code looking for partial boundary in the buffer is written inefficiently, so if we upload a file that starts with CR or LF and then is followed by megabytes of data without these characters: all of these bytes are appended chunk by chunk into internal bytearray and lookup for boundary is performed on growing buffer.
This allows an attacker to cause a denial of service by sending crafted multipart data to an endpoint that will parse it. The amount of CPU time required can block worker processes from handling legitimate requests. The amount of RAM required can trigger an out of memory kill of the process. If many concurrent requests are sent continuously, this can exhaust or kill all available workers.
CVE-2024-34069
The debugger in affected versions of Werkzeug can allow an attacker to execute code on a developer's machine under some circumstances. This requires the attacker to get the developer to interact with a domain and subdomain they control, and enter the debugger PIN, but if they are successful it allows access to the debugger even if it is only running on localhost. This also requires the attacker to guess a URL in the developer's application that will trigger the debugger.
CVE-2024-49766
On Python < 3.11 on Windows,
os.path.isabs()does not catch UNC paths like//server/share. Werkzeug'ssafe_join()relies on this check, and so can produce a path that is not safe, potentially allowing unintended access to data. Applications using Python >= 3.11, or not using Windows, are not vulnerable.CVE-2024-49767
Applications using Werkzeug to parse
multipart/form-datarequests are vulnerable to resource exhaustion. A specially crafted form body can bypass theRequest.max_form_memory_sizesetting.The
Request.max_content_lengthsetting, as well as resource limits provided by deployment software and platforms, are also available to limit the resources used during a request. This vulnerability does not affect those settings. All three types of limits should be considered and set appropriately when deploying an application.Werkzeug DoS: High resource usage when parsing multipart/form-data containing a large part with CR/LF character at the beginning
CVE-2023-46136 / GHSA-hrfv-mqp8-q5rw / PYSEC-2023-221
More information
Details
Werkzeug multipart data parser needs to find a boundary that may be between consecutive chunks. That's why parsing is based on looking for newline characters. Unfortunately, code looking for partial boundary in the buffer is written inefficiently, so if we upload a file that starts with CR or LF and then is followed by megabytes of data without these characters: all of these bytes are appended chunk by chunk into internal bytearray and lookup for boundary is performed on growing buffer.
This allows an attacker to cause a denial of service by sending crafted multipart data to an endpoint that will parse it. The amount of CPU time required can block worker processes from handling legitimate requests. The amount of RAM required can trigger an out of memory kill of the process. If many concurrent requests are sent continuously, this can exhaust or kill all available workers.
Severity
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HReferences
This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).
CVE-2023-46136 / GHSA-hrfv-mqp8-q5rw / PYSEC-2023-221
More information
Details
Werkzeug is a comprehensive WSGI web application library. If an upload of a file that starts with CR or LF and then is followed by megabytes of data without these characters: all of these bytes are appended chunk by chunk into internal bytearray and lookup for boundary is performed on growing buffer. This allows an attacker to cause a denial of service by sending crafted multipart data to an endpoint that will parse it. The amount of CPU time required can block worker processes from handling legitimate requests. This vulnerability has been patched in version 3.0.1.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HReferences
This data is provided by OSV and the PyPI Advisory Database (CC-BY 4.0).
Werkzeug debugger vulnerable to remote execution when interacting with attacker controlled domain
CGA-4f6v-wx38-68gq / CVE-2024-34069 / GHSA-2g68-c3qc-8985
More information
Details
The debugger in affected versions of Werkzeug can allow an attacker to execute code on a developer's machine under some circumstances. This requires the attacker to get the developer to interact with a domain and subdomain they control, and enter the debugger PIN, but if they are successful it allows access to the debugger even if it is only running on localhost. This also requires the attacker to guess a URL in the developer's application that will trigger the debugger.
Severity
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:HReferences
This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).
Werkzeug safe_join not safe on Windows
CVE-2024-49766 / GHSA-f9vj-2wh5-fj8j
More information
Details
On Python < 3.11 on Windows,
os.path.isabs()does not catch UNC paths like//server/share. Werkzeug'ssafe_join()relies on this check, and so can produce a path that is not safe, potentially allowing unintended access to data. Applications using Python >= 3.11, or not using Windows, are not vulnerable.Severity
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:NReferences
This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).
Werkzeug possible resource exhaustion when parsing file data in forms
CVE-2024-49767 / GHSA-q34m-jh98-gwm2
More information
Details
Applications using Werkzeug to parse
multipart/form-datarequests are vulnerable to resource exhaustion. A specially crafted form body can bypass theRequest.max_form_memory_sizesetting.The
Request.max_content_lengthsetting, as well as resource limits provided by deployment software and platforms, are also available to limit the resources used during a request. This vulnerability does not affect those settings. All three types of limits should be considered and set appropriately when deploying an application.Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HReferences
This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).
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