Vulnerability Name:

CVE-2021-41160 (CCN-211854)

Assigned:2021-10-21
Published:2021-10-21
Updated:2022-12-07
Summary:FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. In affected versions a malicious server might trigger out of bound writes in a connected client. Connections using GDI or SurfaceCommands to send graphics updates to the client might send `0` width/height or out of bound rectangles to trigger out of bound writes. With `0` width or heigth the memory allocation will be `0` but the missing bounds checks allow writing to the pointer at this (not allocated) region. This issue has been patched in FreeRDP 2.4.1.
CVSS v3 Severity:5.3 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N)
4.6 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
8.8 High (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
7.7 High (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
3.8 Low (CCN CVSS v2 Vector: AV:L/AC:H/Au:S/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): High
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-787
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2021-41160

Source: XF
Type: UNKNOWN
freerdp-cve202141160-sec-bypass(211854)

Source: CCN
Type: FreeRDP GIT Repository
Improper region checks in all clients allow out of bound write to memory

Source: security-advisories@github.com
Type: Third Party Advisory
security-advisories@github.com

Source: security-advisories@github.com
Type: Mailing List, Third Party Advisory
security-advisories@github.com

Source: security-advisories@github.com
Type: Mailing List, Third Party Advisory
security-advisories@github.com

Source: security-advisories@github.com
Type: Mailing List, Third Party Advisory
security-advisories@github.com

Source: security-advisories@github.com
Type: Third Party Advisory
security-advisories@github.com

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2021-41160

Vulnerable Configuration:Configuration RedHat 1:
  • cpe:/o:redhat:enterprise_linux:7:*:*:*:*:*:*:*
    • Configuration RedHat 2:
  • cpe:/o:redhat:enterprise_linux:7::client:*:*:*:*:*
    • Configuration RedHat 3:
  • cpe:/o:redhat:enterprise_linux:7::server:*:*:*:*:*
    • Configuration RedHat 4:
  • cpe:/o:redhat:enterprise_linux:7::workstation:*:*:*:*:*
    • Configuration RedHat 5:
  • cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*
    • Configuration RedHat 6:
  • cpe:/a:redhat:enterprise_linux:8::appstream:*:*:*:*:*
    • Configuration RedHat 7:
  • cpe:/a:redhat:enterprise_linux:8::crb:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:freerdp:freerdp:2.4.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:724
    P
    		Security update for freerdp (Important)
    2022-09-02
    oval:org.opensuse.security:def:112253
    P
    		freerdp-2.4.1-1.1 on GA media (Moderate)
    2022-01-17
    oval:com.redhat.rhsa:def:20214619
    P
    		RHSA-2021:4619: freerdp security update (Important)
    2021-11-11
    oval:com.redhat.rhsa:def:20214622
    P
    		RHSA-2021:4622: freerdp security update (Important)
    2021-11-11
    BACK
    freerdp freerdp 2.4.0