CVE-2022-46169

Description from NVD

Cacti is an open source platform which provides a robust and extensible operational monitoring and fault management framework for users. In affected versions a command injection vulnerability allows an unauthenticated user to execute arbitrary code on a server running Cacti, if a specific data source was selected for any monitored device. The vulnerability resides in the `remote_agent.php` file. This file can be accessed without authentication. This function retrieves the IP address of the client via `get_client_addr` and resolves this IP address to the corresponding hostname via `gethostbyaddr`. After this, it is verified that an entry within the `poller` table exists, where the hostname corresponds to the resolved hostname. If such an entry was found, the function returns `true` and the client is authorized. This authorization can be bypassed due to the implementation of the `get_client_addr` function. The function is defined in the file `lib/functions.php` and checks serval `$_SERVER` variables to determine the IP address of the client. The variables beginning with `HTTP_` can be arbitrarily set by an attacker. Since there is a default entry in the `poller` table with the hostname of the server running Cacti, an attacker can bypass the authentication e.g. by providing the header `Forwarded-For: `. This way the function `get_client_addr` returns the IP address of the server running Cacti. The following call to `gethostbyaddr` will resolve this IP address to the hostname of the server, which will pass the `poller` hostname check because of the default entry. After the authorization of the `remote_agent.php` file is bypassed, an attacker can trigger different actions. One of these actions is called `polldata`. The called function `poll_for_data` retrieves a few request parameters and loads the corresponding `poller_item` entries from the database. If the `action` of a `poller_item` equals `POLLER_ACTION_SCRIPT_PHP`, the function `proc_open` is used to execute a PHP script. The attacker-controlled parameter `$poller_id` is retrieved via the function `get_nfilter_request_var`, which allows arbitrary strings. This variable is later inserted into the string passed to `proc_open`, which leads to a command injection vulnerability. By e.g. providing the `poller_id=;id` the `id` command is executed. In order to reach the vulnerable call, the attacker must provide a `host_id` and `local_data_id`, where the `action` of the corresponding `poller_item` is set to `POLLER_ACTION_SCRIPT_PHP`. Both of these ids (`host_id` and `local_data_id`) can easily be bruteforced. The only requirement is that a `poller_item` with an `POLLER_ACTION_SCRIPT_PHP` action exists. This is very likely on a productive instance because this action is added by some predefined templates like `Device - Uptime` or `Device - Polling Time`. This command injection vulnerability allows an unauthenticated user to execute arbitrary commands if a `poller_item` with the `action` type `POLLER_ACTION_SCRIPT_PHP` (`2`) is configured. The authorization bypass should be prevented by not allowing an attacker to make `get_client_addr` (file `lib/functions.php`) return an arbitrary IP address. This could be done by not honoring the `HTTP_...` `$_SERVER` variables. If these should be kept for compatibility reasons it should at least be prevented to fake the IP address of the server running Cacti. This vulnerability has been addressed in both the 1.2.x and 1.3.x release branches with `1.2.23` being the first release containing the patch.

Information Acquisition Date:2023-01-16T14:55Z
CVSS 2.0: 0.0 None CVSS 3.x: 9.8 CRITICAL

▼ CVSS3 Vec CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD References

 https://github.com/Cacti/cacti/security/advisories/GHSA-6p93-p743-35gf
     source:MISC
     tags:Exploit    Mitigation    Patch    Third Party Advisory    
 https://github.com/Cacti/cacti/commit/b43f13ae7f1e6bfe4e8e56a80a7cd867cf2db52b
     source:MISC
     tags:Patch    Third Party Advisory    
 https://github.com/Cacti/cacti/commit/a8d59e8fa5f0054aa9c6981b1cbe30ef0e2a0ec9
     source:MISC
     tags:Patch    Third Party Advisory    
 https://github.com/Cacti/cacti/commit/7f0e16312dd5ce20f93744ef8b9c3b0f1ece2216
     source:MISC
     tags:Patch    Third Party Advisory    

This vulnerability may involve a PoC.

Refer to Information on External Sites

CVE InfomationExploits or more Infomation
mitreEXPLOIT DATABASE
NVD0day.today
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CVE DetailsTwitter
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Software Tag: Android(1 tweets) Chrome(1 tweets) Linux(3 tweets) Windows(1 tweets)



List of frequently cited URLs

URLNum of Times Referred to
https://alerts.vulmon.com/?utm_source=twitter&utm_medium=so...271
https://thehackernews.co188
https://cvetrends.com52
http://twinybots.ch16
https://securityaffairs.com/140797/hacking/cacti-servers-cv...13
https://www.helpnetsecurity.com/2023/01/16/exploiting-cve-2...9
https://thehackernews.com/2023/01/cacti-servers-under-attac...6
https://securityonline.info/cve-2022-46169-critical-vulnera...4
https://www.sonarsource.com/blog/cacti-unauthenticated-remo...4
https://github.com/0xf4n9x/CVE-2022-461693
https://xcloud.spectrum.colortokens.com/cve/CVE-2022-461693

▼ Show Information from Twitter(135)


List of frequently cited URLs

URLNum of Times Referred to
alerts.vulmon.com271
thehackernews.co188
cvetrends.com52
twinybots.ch16
securityaffairs.com13
www.helpnetsecurity.com9
thehackernews.com6
securityonline.info4
www.sonarsource.com4
github.com3
xcloud.spectrum.colortokens.com3

▼ Show Information from Twitter(135)


GitHub Search Results: Up to 10
NameURL
0xf4n9x/CVE-2022-46169 https://github.com/0xf4n9x/CVE-2022-46169
Anthonyc3rb3ru5/CVE-2022-46169 https://github.com/Anthonyc3rb3ru5/CVE-2022-46169
sAsPeCt488/CVE-2022-46169 https://github.com/sAsPeCt488/CVE-2022-46169
Inplex-sys/CVE-2022-46169 https://github.com/Inplex-sys/CVE-2022-46169
taythebot/CVE-2022-46169 https://github.com/taythebot/CVE-2022-46169
N1arut/CVE-2022-46169_POC https://github.com/N1arut/CVE-2022-46169_POC
Live-Hack-CVE/CVE-2022-46169 https://github.com/Live-Hack-CVE/CVE-2022-46169
hab1b0x/CVE-2022-46169 https://github.com/hab1b0x/CVE-2022-46169

GitHub Search Results: Up to 10
NameURL
0xf4n9x/CVE-2022-46169 github.com
Anthonyc3rb3ru5/CVE-2022-46169 github.com
sAsPeCt488/CVE-2022-46169 github.com
Inplex-sys/CVE-2022-46169 github.com
taythebot/CVE-2022-46169 github.com
N1arut/CVE-2022-46169_POC github.com
Live-Hack-CVE/CVE-2022-46169 github.com
hab1b0x/CVE-2022-46169 github.com

2023/02/07 Score : 1
Added Har-sia Database : 2022/12/06
Last Modified : 2023/02/07
Highest Scored Date : 2023/01/16
Highest Score : 31