REDHAT-BUG-2485376: Path Traversal
All versions of the package decompress are vulnerable to Arbitrary File Write via Archive Extraction (Zip Slip) when extracting a ZIP archive containing two entries with the same path - the first being a symlink to an arbitrary target and the second being a regular file - the file content is written through the symlink to the target location outside the output directory. This is due to the microtask processing order that checks readlink for the second file before resolving symlink for the first file. An attacker can write arbitrary file on the host filesystem potentially leading to remote code execution by providing a specially crafted ZIP archive.
Note:
This bypasses all existing path traversal protections including preventWritingThroughSymlink, added as a part of the fix for CVE-2020-12265.
Affected Software
Event History
Frequently Asked Questions
What is the severity of REDHAT-BUG-2485376?
The severity of REDHAT-BUG-2485376 is classified as high with a score of 7.
What vulnerability does REDHAT-BUG-2485376 address?
REDHAT-BUG-2485376 addresses an Arbitrary File Write vulnerability via Archive Extraction, often referred to as Zip Slip.
How do I fix REDHAT-BUG-2485376?
To fix REDHAT-BUG-2485376, update the decompress package to the latest version that resolves this vulnerability.
Which software is affected by REDHAT-BUG-2485376?
The software affected by REDHAT-BUG-2485376 is npm/decompress.
What type of attack can REDHAT-BUG-2485376 enable?
REDHAT-BUG-2485376 can enable a Path Traversal attack, allowing arbitrary file writes.