#VU16988 Security restrictions bypass in WinSCP - CVE-2019-6111
Published: January 15, 2019 / Updated: June 17, 2021
Vulnerability identifier: #VU16988
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2019-6111
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerable software:
WinSCP
WinSCP
Software vendor:
winscp.sourceforge.net
winscp.sourceforge.net
Description
The vulnerability allows a remote attacker to bypass security restrictions on the target system.
The weakness exists due to missing received object name validation by the scp client. A malicious SCP server can overwrite arbitrary files in the SCP client target directory. If a recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example overwrite .ssh/authorized_keys).
The weakness exists due to missing received object name validation by the scp client. A malicious SCP server can overwrite arbitrary files in the SCP client target directory. If a recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example overwrite .ssh/authorized_keys).
Remediation
Update to version 5.14.