CVE-2024-34064

Publication date 6 May 2024

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Jinja is an extensible templating engine. The `xmlattr` filter 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 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 `xmlattr` filter, 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. This vulnerability is fixed in 3.1.4.

Status

Package Ubuntu Release Status
jinja2 24.10 oracular
Fixed 3.1.3-1ubuntu1
24.04 LTS noble
Fixed 3.1.2-1ubuntu1.1
23.10 mantic
Fixed 3.1.2-1ubuntu0.23.10.2
22.04 LTS jammy
Fixed 3.0.3-1ubuntu0.2
20.04 LTS focal
Fixed 2.10.1-2ubuntu0.3
18.04 LTS bionic
16.04 LTS xenial
14.04 LTS trusty

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