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CVE-2020-11018— Out of bound read in cliprdr_server_receive_capabilities 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cliprdr_server_receive_capabilities存在缓冲区错误漏洞。攻击者可借助恶意客户端利用该漏洞随机分配内存大小，导致资源耗尽。

CVSS 6.5 · Medium EPSS 1.90% · P79

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2020-11018

Vulnerability Information
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Vulnerability Title
Out of bound read in cliprdr_server_receive_capabilities in FreeRDP
Source: CVE Program / CVE List V5
Vulnerability Description
In FreeRDP less than or equal to 2.0.0, a possible resource exhaustion vulnerability can be performed. Malicious clients could trigger out of bound reads causing memory allocation with random size. This has been fixed in 2.1.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
FreeRDP 缓冲区错误漏洞
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cliprdr_server_receive_capabilities存在缓冲区错误漏洞。攻击者可借助恶意客户端利用该漏洞随机分配内存大小，导致资源耗尽。
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-2020-11018

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III. Intelligence Information for CVE-2020-11018

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Vendor Advisories for CVE-2020-11018 (1)

Mailing List Discussions for CVE-2020-11018 (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-2020-11019 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-2020-11041 2.2 LOW Improper Validation of Array Index 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-125

V. Comments for CVE-2020-11018

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