CVE-2024-23334 aiohttp.web.static(follow_symlinks=True) is vulnerable to directory traversal

2024-01-2922:41:39

CWE-22

GitHub_M

www.cve.org

cve-2024-23334

aiohttp

web server

directory traversal

vulnerability

static routes

follow_symlinks

symbolic links

validation

unauthorized access

reverse proxy

fix

version 3.9.2

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

7.6 High

AI Score

Confidence

High

0.052 Low

EPSS

Percentile

93.0%

JSON

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. When using aiohttp as a web server and configuring static routes, it is necessary to specify the root path for static files. Additionally, the option ‘follow_symlinks’ can be used to determine whether to follow symbolic links outside the static root directory. When ‘follow_symlinks’ is set to True, there is no validation to check if reading a file is within the root directory. This can lead to directory traversal vulnerabilities, resulting in unauthorized access to arbitrary files on the system, even when symlinks are not present. Disabling follow_symlinks and using a reverse proxy are encouraged mitigations. Version 3.9.2 fixes this issue.

CNA Affected

[
  {
    "vendor": "aio-libs",
    "product": "aiohttp",
    "versions": [
      {
        "version": "< 3.9.2",
        "status": "affected"
      }
    ]
  }
]