PT-2021-20099 · Winscp · Winscp

Fabian Bräunlein · Published 2021-01-27 · Updated 2021-02-04 · CVE-2021-3331

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions WinSCP versions prior to 5.17.10

Description The issue allows remote attackers to execute arbitrary programs when the URL handler encounters a crafted URL that loads session settings. This is exploitable in a default installation in which WinSCP is the handler for sftp:// URLs.

Recommendations For versions prior to 5.17.10, update to version 5.17.10 or later to resolve the issue. As a temporary workaround, consider restricting the use of the URL handler for sftp:// URLs until a patch is applied.

Fix

Related Identifiers

CVE-2021-3331

Affected Products

Winscp

References · 8

• https://github.com/winscp/winscp/commit/faa96e8144e6925a380f94a97aa382c9427f688d · Patch
• https://winscp.net/tracker/1943 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-3331 · Security Note
• https://osv.dev/vulnerability/CVE-2021-3331 · Vendor Advisory
• https://winscp.net/eng/docs/history#5.17.10 · Vendor Advisory
• https://winscp.net/eng/docs/rawsettings · Vendor Advisory
• https://t.me/cibsecurity/22767 · Telegram Post
• https://t.me/cvenotify/9420 · Telegram Post