CVE-2020-8437: bittorrent utorrent NULL Pointer Dereference
CVSS: 7.5v3.1HighModified
Published 02-03-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-8437 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in bittorrent utorrent. EPSS estimates a 12.04% chance of exploitation in the next 30 days, higher than 96.1% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
12.04%
0%100%
Medium · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 02-03-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 1 source · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesSingle source
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
12.04%
Chance of exploitation in the next 30 days
Percentile
96%
Versus all other CVEs
30-day change
0.00 pp
From 12.04% on 19-09-2026
19-09-202619-10-2026
EPSS score12.04%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (blog.whtaguy.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Bittorrent1 product
- utorrent≤ 3.5.5
1 vendor · 1 product
References
4 links- utclient.utorrent.com/offers/beta_release_notes/release_notes.htmlX Refsource CONFIRMRelease NotesVendor Advisory
- blog.whtaguy.com/2020/09/utorrent-cve-2020-8437-vulnerability.htmlX Refsource MISCExploitThird Party Advisory