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CVE-2020-8284

Public on 2020-12-14
Modified on 2021-08-05
Description

A malicious server can use the `PASV` response to trick curl into connecting back to a given IP address and port, and this way potentially make curl extract information about services that are otherwise private and not disclosed, for example doing port scanning and service banner extractions. If curl operates on a URL provided by a user, a user can exploit that and pass in a URL to a malicious FTP server instance without needing any server breach to perform the attack.

Severity
Medium
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CVSS v3 Base Score
3.1
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Core curl 2021-08-04 20:32 ALAS2-2021-1693

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD CVSSv2 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N
NVD CVSSv3 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References

Red Hat: CVE-2020-8284 Mitre: CVE-2020-8284 FAQs regarding Amazon Linux ALAS/CVE Severity