Persistent XSS on Comtrend AR-5387un router# CVE-2018-8062
Persistent XSS on Comtrend AR-5387un router
## Exploitation explanation:
To exploit this vulnerability, once logged into the router, a WAN service must be created
Click on "Advanced Setup", "WAN Service". "Add button", "Next"
Then insert the payload into the "Enter Service Description" field. This was used for the PoC <script>alert('xss');</script>
Then click on "Next" four times to go on through the steps and finally click on "Apply/Save"
The result of the XSS will be displayed and triggered on the WAN services page
This exploit automatize the entire process bypassing CSRF protection and allowing to set a custom XSS payload
Happy hacking :)
## Disclosure timeline:
08/03/2018: Vulnerability was discovered
10/03/2018: Reported to Mitre (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8062)
11/03/2018: Mitre answered, CVE number reserved
11/03/2018: Reported to Comtrend as part of responsible disclosure, they never answered
16/10/2020: Two years later, reported again to Comtrend and public disclosure
(https://twitter.com/OscarAkaElvis/status/1317004119509471233)
18/10/2020: Exploit creation
19/10/2020: Exploit sent to exploit-db
## Related links
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8062
https://packetstormsecurity.com/files/159618/Comtrend-AR-5387un-Cross-Site-Scripting.html
https://www.exploit-db.com/exploits/48908
https://twitter.com/OscarAkaElvis/status/1317004119509471233
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