CVE-2024-7774: langchain-ai langchain-ai/langchainjs Path Traversal: '\..\filename'

Vulnerability summary

CVE-2024-7774 is a critical (CVSS 9.1) Path Traversal: '\..\filename' vulnerability in langchain-ai langchain-ai/langchainjs. EPSS estimates a 0.56% chance of exploitation in the next 30 days, higher than 45.3% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 29-10-2024
   PublishedVulnerability first disclosed.
2. 29-10-2024
   Last modifiedVulnerability information updated.

Description

A path traversal vulnerability exists in the `getFullPath` method of langchain-ai/langchainjs version 0.2.5. This vulnerability allows attackers to save files anywhere in the filesystem, overwrite existing text files, read `.txt` files, and delete files. The vulnerability is exploited through the `setFileContent`, `getParsedFile`, and `mdelete` methods, which do not properly sanitize user input.

• CWE-29Path Traversal: '\..\filename'The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize '\..\filename' (leading backslash dot dot) sequences that can resolve to a location that is outside of that directory.
• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.