werkzeug@0.7.1 vulnerabilities

The comprehensive WSGI web application library.

Direct Vulnerabilities

Known vulnerabilities in the werkzeug package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability Vulnerable Version
  • H
Remote Code Execution (RCE)

Affected versions of this package are vulnerable to Remote Code Execution (RCE) due to insufficient hostname checks and the use of relative paths to resolve requests. When the debugger is enabled, an attacker can convince a user to enter their own PIN to interact with a domain and subdomain they control, and thereby cause malicious code to be executed.

The demonstrated attack vector requires a number of conditions that render this attack very difficult to achieve, especially if the victim application is running in the recommended configuration of not having the debugger enabled in production.

How to fix Remote Code Execution (RCE)?

Upgrade werkzeug to version 3.0.3 or higher.

[,3.0.3)
  • M
Inefficient Algorithmic Complexity

Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity in multipart data parsing. An attacker can cause a denial of service and block worker processes from handling legitimate requests by sending crafted multipart data to an endpoint that will parse it, eventually exhausting or killing all available workers.

Exploiting this vulnerability is possible if the uploaded file starts with CR or LF and is followed by megabytes of data without these characters.

How to fix Inefficient Algorithmic Complexity?

Upgrade werkzeug to version 2.3.8, 3.0.1 or higher.

[,2.3.8) [3.0.0,3.0.1)
  • H
Denial of Service (DoS)

Affected versions of this package are vulnerable to Denial of Service (DoS) when parsing multipart form data. An attacker can trigger the opening of multipart files containing a large number of file parts, which are processed using request.data, request.form, request.files, or request.get_data(parse_form_data=False), consuming CPU, memory, or file handles resources. The amount of CPU time required can block worker processes from handling other requests. The amount of RAM required can trigger an out-of-memory and crash the process.

How to fix Denial of Service (DoS)?

Upgrade werkzeug to version 2.2.3 or higher.

[,2.2.3)
  • L
Access Restriction Bypass

Affected versions of this package are vulnerable to Access Restriction Bypass that allows a malicious application on an adjacent subdomain to present "nameless" cookies that look like =value instead of key=value and have them accepted by the affected browser. For example, a cookie like =__Host-test=bad would be parsed as __Host-test=bad and the key treated as valid while the value is ignored.

How to fix Access Restriction Bypass?

Upgrade werkzeug to version 2.2.3 or higher.

[,2.2.3)
  • H
Directory Traversal

Affected versions of this package are vulnerable to Directory Traversal in SharedDataMiddleware via the os.path.join() function, when fetching requested files. When exploiting this vulnerability a path segment with a drive name will change the drive of the final path.

Note: This vulnerability is exploitable only in Windows environments.

How to fix Directory Traversal?

Upgrade werkzeug to version 0.15.5 or higher.

[,0.15.5)
  • H
Open Redirect

Werkzeug is a WSGI web application library.

Affected versions of this package are vulnerable to Open Redirect. It is possible to redirect a user in werkzeug via a double slash in the URL.

How to fix Open Redirect?

Upgrade Werkzeug to version 0.11.6 or higher.

[,0.11.6)
  • L
Insufficient Randomness

Werkzeug is a WSGI web application library.

Affected versions of this package are vulnerable to Insufficient Randomness. SHA1 hash algorithm is used with 1000 rounds for hashing. This deviates from security best practice.

How to fix Insufficient Randomness?

Upgrade Werkzeug to version 0.12 or higher.

[,0.12)
  • H
Insufficient Randomness

Werkzeug is a WSGI web application library.

Affected versions of this package are vulnerable to Insufficient Randomness when used with Docker, it has insufficient debugger PIN randomness because Docker containers share the same machine id.

How to fix Insufficient Randomness?

Upgrade Werkzeug to version 0.15.3 or higher.

[,0.15.3)
  • M
Cross-site Scripting (XSS)

werkzeug is a comprehensive WSGI web application library.

Affected versions of this package are vulnerable to Cross-site Scripting (XSS). It allows remote attackers to inject arbitrary web script or HTML via a field that contains an exception message.

How to fix Cross-site Scripting (XSS)?

Upgrade werkzeug to version 0.11.11 or higher.

[,0.11.11)
  • M
HTTP Response Splitting

Affected versions of werkzeug are vulnerable to HTTP Response Splitting. It allows newline characters in values in the header. An attacker can leverage this to inject arbitrary headers and conduct HTTP response splitting attacks.

How to fix HTTP Response Splitting?

Upgrade werkzeug to version 0.8 or higher.

[,0.8)
  • M
Cross-site Scripting (XSS)

werkzeug is the Swiss Army knife of Python web development.

Affected versions of this package are vulnerable to Cross-site Scripting (XSS) attacks via the plaintext variable in the debug page.

[,0.11.11)
  • M
Cross-site Scripting (XSS)

werkzeug is the Swiss Army knife of Python web development.

Affected versions of this package are vulnerable to Cross-site Scripting (XSS) attacks due to the lack of sanitization of the redirect url links.

[,0.8.3)