CVE-2020-11018— Out of bound read in cliprdr_server_receive_capabilities in FreeRDP
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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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存读
Source: NVD (National Vulnerability Database)
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
II. Public POCs for CVE-2020-11018
| # | POC Description | Source Link | Shenlong Link |
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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
- CVE-2026-40254
FreeRDP: contains_dotdot() off-by-one allows drive channel p - CVE-2026-33995
FreeRDP: Possible double free in kerberos_AcceptSecurityCont - CVE-2026-33987
FreeRDP: Persistent Cache bmpSize Desync - Heap OOB Write - CVE-2026-33986
FreeRDP: H.264 YUV Buffer Dimension Desync - Heap OOB Write - CVE-2026-33985
FreeRDP: ClearCodec Glyph Cache Count Desync - Heap OOB Read
Same vendor: FreeRDP
- CVE-2026-40254
FreeRDP: contains_dotdot() off-by-one allows drive channel p - CVE-2026-33995
FreeRDP: Possible double free in kerberos_AcceptSecurityCont - CVE-2026-33987
FreeRDP: Persistent Cache bmpSize Desync - Heap OOB Write - CVE-2026-33986
FreeRDP: H.264 YUV Buffer Dimension Desync - Heap OOB Write - CVE-2026-33985
FreeRDP: ClearCodec Glyph Cache Count Desync - Heap OOB Read
Same weakness: CWE-125
- CVE-2026-8177
XML::LibXML versions through 2.0210 for Perl read out-of-bou - CVE-2026-6104
Global buffer over-read in mb_convert_encoding() with attack - CVE-2026-7258
Out-of-bounds read in urldecode() on NetBSD - CVE-2026-8186
Open5GS NF client.c ogs_sbi_client_send_via_scp_or_sepp out- - CVE-2026-3508
ASUS System Control Interface 缓冲区错误漏洞
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