Resource management error in BearFTP - CVE-2020-8815
Published: February 14, 2020
Vulnerability identifier: #VU25369
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-8815
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper connection handling in the base connection handler. A remote attacker can cause a denial of service condition via a Slowloris approach by sending a large volume of small packets.
Affected software
BearFTP
How to mitigate CVE-2020-8815
Install updates from vendor's website.
BearFTP - addressed in versions 0.3.1, 0.4.0
External References
- https://github.com/kolya5544/BearFTP
- https://github.com/kolya5544/BearFTP/blob/f5a8047587c1a96456d4f291c12b038b9ab0d0c5/BearFTP/Program.cs#L503-L525
- https://github.com/kolya5544/BearFTP/commit/17a6ead72d4a25cbfcef5e27613aa0a5f88a4b26
- https://github.com/kolya5544/BearFTP/commit/66dc9d95e58bca133f265457d32007cdf38b66ad
- https://github.com/kolya5544/BearFTP/releases/tag/0.4.0