CVE-2020-15103 Information

Description

In FreeRDP less than or equal to 2.1.2 an integer overflow exists due to missing input sanitation in rdpegfx channel. All FreeRDP clients are affected. The input rectangles from the server are not checked against local surface coordinates and blindly accepted. A malicious server can send data that will crash the client later on (invalid length arguments to a memcpy) This has been fixed in 2.2.0. As a workaround stop using command line arguments /gfx /gfx-h264 and /network:auto

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L

Reference

http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00010.html https://github.com/FreeRDP/FreeRDP/blob/616af2d5b86dc24c7b3e89870dbcffd841d9a535/ChangeLogL4 https://github.com/FreeRDP/FreeRDP/pull/6382 https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4r38-6hq7-j3j9 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6Y35HBHG2INICLSGCIKNAR7GCXEHQACQ/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XOZLH35OJWIQLM7FYDXAP2EAUBDXE76V/ https://usn.ubuntu.com/4481-1/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

LOW

Base Severity

3.5