Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly

Appearance settings

CVE-2007-4559 Patch#257

Open
TrellixVulnTeam wants to merge 1 commit into
bruderstein:masterbruderstein/PythonScript:masterfrom
TrellixVulnTeam:masterTrellixVulnTeam/PythonScript_ZRVV:masterCopy head branch name to clipboard
Open

CVE-2007-4559 Patch#257
TrellixVulnTeam wants to merge 1 commit into
bruderstein:masterbruderstein/PythonScript:masterfrom
TrellixVulnTeam:masterTrellixVulnTeam/PythonScript_ZRVV:masterCopy head branch name to clipboard

Conversation

@TrellixVulnTeam

Copy link
Copy Markdown

Patching CVE-2007-4559

Hi, we are security researchers from the Advanced Research Center at Trellix. We have began a campaign to patch a widespread bug named CVE-2007-4559. CVE-2007-4559 is a 15 year old bug in the Python tarfile package. By using extract() or extractall() on a tarfile object without sanitizing input, a maliciously crafted .tar file could perform a directory path traversal attack. We found at least one unsantized extractall() in your codebase and are providing a patch for you via pull request. The patch essentially checks to see if all tarfile members will be extracted safely and throws an exception otherwise. We encourage you to use this patch or your own solution to secure against CVE-2007-4559. Further technical information about the vulnerability can be found in this blog.

If you have further questions you may contact us through this projects lead researcher Kasimir Schulz.

@chcg

chcg commented Aug 5, 2023

Copy link
Copy Markdown
Collaborator

See https://peps.python.org/pep-0706/ which is part of 3.12 with backports (see python/cpython#102950)

But:
This proposal improves security, at the expense of backwards compatibility. In particular, it will help users avoid CVE-2007-4559.

, so it is no fix and standard behaviour just improves with python 3.14 or newer.

In Python 3.12-3.13, a DeprecationWarning will be emitted and extraction will use the 'fully_trusted' filter.
In Python 3.14+, it will use the 'data' filter.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

None yet

Projects

None yet

Development

Successfully merging this pull request may close these issues.

2 participants

Morty Proxy This is a proxified and sanitized view of the page, visit original site.