CVE-2020-8437
HIGHCVSS 7.5/10EPSS 12.04%
Last modified
CVE-2020-8437 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The bencoding parser in BitTorrent uTorrent through 3.5.5 (build 45505) misparses nested bencoded dictionaries, which allows a remote attacker to cause a denial of service.. EPSS estimates a 12.04% chance of exploitation in the next 30 days.
Description
The bencoding parser in BitTorrent uTorrent through 3.5.5 (build 45505) misparses nested bencoded dictionaries, which allows a remote attacker to cause a denial of service.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Bittorrent | Utorrent | <= 3.5.5 |
References
- https://blog.whtaguy.com/2020/09/utorrent-cve-2020-8437-vulnerability.htmlExploit, Third Party Advisory
- https://forum.utorrent.com/forum/13-announcements/Vendor Advisory
- https://twitter.com/va_startThird Party Advisory
- https://utclient.utorrent.com/offers/beta_release_notes/release_notes.htmlRelease Notes, Vendor Advisory
- https://blog.whtaguy.com/2020/09/utorrent-cve-2020-8437-vulnerability.htmlExploit, Third Party Advisory
- https://forum.utorrent.com/forum/13-announcements/Vendor Advisory
- https://twitter.com/va_startThird Party Advisory
- https://utclient.utorrent.com/offers/beta_release_notes/release_notes.htmlRelease Notes, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-8437?
The bencoding parser in BitTorrent uTorrent through 3.5.5 (build 45505) misparses nested bencoded dictionaries, which allows a remote attacker to cause a denial of service.
How severe is CVE-2020-8437?
CVE-2020-8437 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 12.04% probability of exploitation in the next 30 days.
How do I fix CVE-2020-8437?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2020-8437?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST