CVE-2020-11058— Improper Restriction of Operations within the Bounds of a Memory Buffer 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 1.1之后版本（2.0.0版本已修复）中的rdp_read_font_capability_set存在缓冲区错误漏洞。该漏洞源于网络系统或产品在内存上执行操作时，未正确验证数据边界，导致向关联的其他内存位置上执行了错误的读写操作。攻击者可利用该漏洞导致缓冲区溢出或堆溢出等。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2020-11058
Vulnerability Information
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Vulnerability Title
Improper Restriction of Operations within the Bounds of a Memory Buffer in FreeRDP
Source: CVE Program / CVE List V5
Vulnerability Description
In FreeRDP after 1.1 and before 2.0.0, a stream out-of-bounds seek in rdp_read_font_capability_set could lead to a later out-of-bounds read. As a result, a manipulated client or server might force a disconnect due to an invalid data read. This has been fixed in 2.0.0.
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
内存缓冲区边界内操作的限制不恰当
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 1.1之后版本（2.0.0版本已修复）中的rdp_read_font_capability_set存在缓冲区错误漏洞。该漏洞源于网络系统或产品在内存上执行操作时，未正确验证数据边界，导致向关联的其他内存位置上执行了错误的读写操作。攻击者可利用该漏洞导致缓冲区溢出或堆溢出等。
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-2020-11058
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2020-11058 (1)
Vendor Advisories for CVE-2020-11058 (1)
Mailing List Discussions for CVE-2020-11058 (2)
Other References for CVE-2020-11058 (1)
IV. Related Vulnerabilities
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FreeRDP before 3.31.0 Integer Overflow via audin Apple backe -
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CVE-2026-91961
FreeRDP before 3.31.0 Denial of Service via URBDRC
Same vendor: FreeRDP
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CVE-2026-91964
FreeRDP 2.0.0 through 3.30.0 Heap Buffer Overflow via Routin -
CVE-2026-91963
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CVE-2026-91962
FreeRDP before 3.31.0 Integer Overflow via audin Apple backe -
CVE-2026-91960
FreeRDP before 3.31.0 Integer Overflow Double Free -
CVE-2026-91961
FreeRDP before 3.31.0 Denial of Service via URBDRC
Same weakness: CWE-119
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V. Comments for CVE-2020-11058
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