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CVE-2020-11041— Improper Validation of Array Index in FreeRDP

Quick assessment

Affected
FreeRDP FreeRDP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FreeRDP是FreeRDP团队的一款开源的远程桌面协议（RDP）的实现。 FreeRDP 2.0.0及之前版本中的rdpsnd_recv_wave2_pdu存在输入验证错误漏洞。该漏洞源于网络系统或产品未对输入的数据进行正确的验证。

CVSS 2.2 · Low EPSS 1.54% · P74

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2020-11041

Vulnerability Information
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Vulnerability Title
Improper Validation of Array Index in FreeRDP
Source: CVE Program / CVE List V5
Vulnerability Description
In FreeRDP less than or equal to 2.0.0, an outside controlled array index is used unchecked for data used as configuration for sound backend (alsa, oss, pulse, ...). The most likely outcome is a crash of the client instance followed by no or distorted sound or a session disconnect. If a user cannot upgrade to the patched version, a workaround is to disable sound for the session. This has been patched in 2.1.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对数组索引的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
FreeRDP 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeRDP是FreeRDP团队的一款开源的远程桌面协议（RDP）的实现。 FreeRDP 2.0.0及之前版本中的rdpsnd_recv_wave2_pdu存在输入验证错误漏洞。该漏洞源于网络系统或产品未对输入的数据进行正确的验证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreeRDP FreeRDP <= 2.0.0 -

II. Public POCs for CVE-2020-11041

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III. Intelligence Information for CVE-2020-11041

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Vendor Advisories for CVE-2020-11041 (1)

Mailing List Discussions for CVE-2020-11041 (2)

Same Patch Batch · FreeRDP · 2020-05-29 · 13 CVEs total

CVE-2020-11039 8.0 HIGH Integer Overflow in FreeRDP
CVE-2020-11038 6.9 MEDIUM Integer Overflow to Buffer Overflow in FreeRDP
CVE-2020-11017 6.5 MEDIUM Double free in cliprdr_server_receive_capabilities in FreeRDP
CVE-2020-11018 6.5 MEDIUM Out of bound read in cliprdr_server_receive_capabilities in FreeRDP
CVE-2020-11019 4.3 MEDIUM Out of bound read in update_recv in FreeRDP
CVE-2020-11089 3.7 LOW Out-of-bound read in FreeRDP
CVE-2020-11086 3.1 LOW Out-of-bounds Read in FreeRDP `ntlm_read_ntlm_v2_response`
CVE-2020-11087 3.1 LOW Out-of-bounds Read in FreeRDP
CVE-2020-11088 3.1 LOW Out-of-bound read in FreeRDP
CVE-2020-11085 2.6 LOW Out-of-bounds Read in FreeRDP
CVE-2020-11040 2.2 LOW Out-of-bounds Read in FreeRDP
CVE-2020-11043 2.2 LOW Out-of-bounds Read in FreeRDP

IV. Related Vulnerabilities

Same product: FreeRDP
Same vendor: FreeRDP
Same weakness: CWE-129

V. Comments for CVE-2020-11041

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