Vulnerability CVE-2018-20684
Published: 2019-01-10

Description:
In WinSCP before 5.14 beta, due to missing validation, the scp implementation would accept arbitrary files sent by the server, potentially overwriting unrelated files. This affects TSCPFileSystem::SCPSink in core/ScpFileSystem.cpp.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
SCP Server Verification Issues
Harry Sintonen
16.01.2019

Type:

CWE-20

 (Improper Input Validation)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.4/10
4.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
Partial
Affected software
Winscp -> Winscp 

 References:
http://www.securityfocus.com/bid/106526
https://github.com/winscp/winscp/commit/49d876f2c5fc00bcedaa986a7cf6dedd6bf16f54
https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt
https://winscp.net/eng/docs/history
https://winscp.net/tracker/1675
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