Debian LTS: DLA-3744-1: python-django security update
Summary
* CVE-2021-28658: Prevent a directory traversal issue which could
have been exploited by maliciously crafted filenames. However, the
built-in upload handlers were not affected by this vulnerability.
(#986447)
* CVE-2021-31542: Fix a potential directory-traversal vulnerability
that could have been exploited by uploaded files. The
MultiPartParser, UploadedFile and FieldFile classes allowed
directory-traversal via uploaded files with suitably crafted file
names. In order to mitigate this risk, stricter basename and path
sanitation is now applied. Specifically, empty file names and
paths with dot segments are rejected. (#988053)
* CVE-2021-33203: Prevent a potential directory traversal via
admindocs. Staff members could use the admindocs
TemplateDetailView view to check the existence of arbitrary files.
Additionally, if (and only if) the default admindocs templates
have been customized by the developers to also expose the file
contents, then not only the existence but also the file contents
would have been exposed. As a mitigation, path sanitation is now
applied and only files within the template root directories can be
loaded. (#989394)
* CVE-2021-33571: Prevent possible SSRF, RFI (Remote File Inclusion)
and LFI (Local File Inclusion) attacks, since validators accepted
leading zeros in IPv4 addresses URLValidator,
validate_ipv4_address() and validate_ipv46_address() did not
prohibit leading zeros in octal literals. (#989394)
For Debian 10 buster, these problems have been fixed in version
1:1.11.29-1+deb10u11.
We recommend that you upgrade your python-django packages.
For the detailed security status of python-django please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/python-django
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
