Vulnerability Name:

CVE-2020-8437 (CCN-177119)

Assigned:2020-02-10
Published:2020-02-10
Updated:2022-05-03
Summary: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 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-476
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2020-8437

Source: CCN
Type: BitTorrent Web site
BitTorrent

Source: MISC
Type: Exploit, Third Party Advisory
https://blog.whtaguy.com/2020/09/utorrent-cve-2020-8437-vulnerability.html

Source: XF
Type: UNKNOWN
bittorrent-cve20208437-dos(177119)

Source: MISC
Type: Vendor Advisory
https://forum.utorrent.com/forum/13-announcements/

Source: MISC
Type: Third Party Advisory
https://twitter.com/va_start

Source: CCN
Type: uTorrent Web site
uTorrent Beta client release notes

Source: CONFIRM
Type: Release Notes, Vendor Advisory
https://utclient.utorrent.com/offers/beta_release_notes/release_notes.html

Vulnerable Configuration:Configuration 1:
  • cpe:/a:bittorrent:utorrent:*:*:*:*:*:*:*:* (Version <= 3.5.5)

    • Configuration CCN 1:
  • cpe:/a:bittorrent:bittorrent:*:*:*:*:*:*:*:*
  • OR cpe:/a:utorrent:utorrent:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    bittorrent utorrent *
    bittorrent bittorrent *
    utorrent utorrent *