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.

CVSS v3.1 NVD

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 NVD

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS

12.04% chance of exploitation in the next 30 days, 96th percentile

Published

2020-03-02

Updated

2024-08-04

Proof-of-concept exploits (2)

• guywhataguy/uTorrent-CVE-2020-843711★ · 2026-02-01
• mavlevin/uTorrent-CVE-2020-843711★ · 2026-02-01

Security advisories

• https://forum.utorrent.com/forum/13-announcements
• https://utclient.utorrent.com/offers/beta_release_notes/release_notes.html
• https://blog.whtaguy.com/2020/09/utorrent-cve-2020-8437-vulnerability.html
• https://twitter.com/va_start

References

• CVE Record
• NVD entry

Related

• CVE-2019-12181
• CVE-2019-17424
• CVE-2021-27342