chore(deps): update dependency jinja2 to v3.1.5 [security] #16
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Reviewer's Guide by SourceryThis PR updates the jinja2 dependency from version 3.1.3 to 3.1.5 to address multiple security vulnerabilities. The update also includes some bug fixes and improvements. Sequence diagram showing potential XSS vulnerability in xmlattr filtersequenceDiagram
actor Attacker
actor Victim
participant App
participant Jinja2
Note over Attacker, Jinja2: CVE-2024-34064 vulnerability (v3.1.3)
Attacker->>App: Submit malicious attribute key with '/' or '>'
App->>Jinja2: Use xmlattr filter with malicious key
Jinja2-->>App: Renders unsafe HTML attributes
App-->>Victim: Serves page with injected attributes
Note over Victim: Potential XSS attack
Note over Attacker, Jinja2: After fix in v3.1.5
Attacker->>App: Submit malicious attribute key
App->>Jinja2: Use xmlattr filter
Jinja2-->>App: Blocks keys with '/', '>', '='
App-->>Victim: Serves safe page
Sequence diagram showing sandbox escape vulnerabilitysequenceDiagram
actor Attacker
participant App
participant Jinja2
participant Python
Note over Attacker, Python: CVE-2024-56326 vulnerability (v3.1.3)
Attacker->>App: Submit template with malicious str.format reference
App->>Jinja2: Execute template in sandbox
Jinja2->>Python: Indirect str.format call via filter
Note over Python: Arbitrary code execution
Note over Attacker, Python: After fix in v3.1.5
Attacker->>App: Submit template with malicious str.format
App->>Jinja2: Execute template in sandbox
Jinja2-->>App: Blocks indirect format calls
Note over App: Attack prevented
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PR Summary
This PR updates the Jinja2 dependency from version 3.1.3 to 3.1.5 to address three critical security vulnerabilities in the NextGenContributions/nitpick repository.
- Updates
docs/requirements.txtto use Jinja2 3.1.5 to fix CVE-2024-34064 (XSS via xmlattr filter) - Patches CVE-2024-56326 vulnerability in sandboxed environment str.format handling
- Fixes CVE-2024-56201 compiler bug that could allow arbitrary code execution
- Includes improvements to async template handling and generator cleanup
- Maintains Python version compatibility requirements (>=3.8, <4.0)
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This PR contains the following updates:
==3.1.3->==3.1.5GitHub Vulnerability Alerts
CVE-2024-34064
The
xmlattrfilter in affected versions of Jinja accepts keys containing non-attribute characters. XML/HTML attributes cannot contain spaces,/,>, or=, as each would then be interpreted as starting a separate attribute. If an application accepts keys (as opposed to only values) as user input, and renders these in pages that other users see as well, an attacker could use this to inject other attributes and perform XSS. The fix for the previous GHSA-h5c8-rqwp-cp95 CVE-2024-22195 only addressed spaces but not other characters.Accepting keys as user input is now explicitly considered an unintended use case of the
xmlattrfilter, and code that does so without otherwise validating the input should be flagged as insecure, regardless of Jinja version. Accepting values as user input continues to be safe.CVE-2024-56326
An oversight in how the Jinja sandboxed environment detects calls to
str.formatallows an attacker that controls the content of a template to execute arbitrary Python code.To exploit the vulnerability, an attacker needs to control the content of a template. Whether that is the case depends on the type of application using Jinja. This vulnerability impacts users of applications which execute untrusted templates.
Jinja's sandbox does catch calls to
str.formatand ensures they don't escape the sandbox. However, it's possible to store a reference to a malicious string'sformatmethod, then pass that to a filter that calls it. No such filters are built-in to Jinja, but could be present through custom filters in an application. After the fix, such indirect calls are also handled by the sandbox.CVE-2024-56201
A bug in the Jinja compiler allows an attacker that controls both the content and filename of a template to execute arbitrary Python code, regardless of if Jinja's sandbox is used.
To exploit the vulnerability, an attacker needs to control both the filename and the contents of a template. Whether that is the case depends on the type of application using Jinja. This vulnerability impacts users of applications which execute untrusted templates where the template author can also choose the template filename.
Release Notes
pallets/jinja (jinja2)
v3.1.5Compare Source
Unreleased
renderfor an async template usesasyncio.run.:pr:
1952auto_aiterwarnings. :pr:1960aclose-ableAsyncGeneratorfromTemplate.generate_async. :pr:1960root_render_func()unclosed inTemplate.generate_async. :pr:1960:pr:
1960v3.1.4Compare Source
Released 2024-05-05
xmlattrfilter does not allow keys with/solidus,>greater-than sign, or
=equals sign, in addition to disallowing spaces.Regardless of any validation done by Jinja, user input should never be used
as keys to this filter, or must be separately validated first.
:ghsa:
h75v-3vvj-5mfjConfiguration
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Summary by Sourcery
Update Jinja2 to version 3.1.5 to address security vulnerabilities (CVE-2024-34064, CVE-2024-56326, and CVE-2024-56201).
Bug Fixes:
Chores: