CVE-2020-14363
Quick assessment
Affected
The X11 Project libX11
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.
X.Org libX11是X.Org基金会的一个X11（X Window系统）客户端库。 X.Org libX11存在安全漏洞，目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。
Possible ATT&CK Techniques 1 AI
T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2020-14363
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An integer overflow vulnerability leading to a double-free was found in libX11. This flaw allows a local privileged attacker to cause an application compiled with libX11 to crash, or in some cases, result in arbitrary code execution. The highest threat from this flaw is to confidentiality, integrity as well as system availability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
X.Org libX11 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
X.Org libX11是X.Org基金会的一个X11（X Window系统）客户端库。 X.Org libX11存在安全漏洞，目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。
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 |
|---|---|---|---|---|
| The X11 Project | libX11 | 1.6.12 | - |
|
II. Public POCs for CVE-2020-14363
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2020-14363 (2)
-
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14363 x_refsource_CONFIRM
-
Mailing List Discussions for CVE-2020-14363 (2)
-
https://lists.x.org/archives/xorg-announce/2020-August/003056.html x_refsource_MISC
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7AVXCQOSCAPKYYHFIJAZ6E2C7LJBTLXF/ vendor-advisory x_refsource_FEDORA
Other References for CVE-2020-14363 (2)
-
https://github.com/Ruia-ruia/Exploits/blob/master/DFX11details.txt x_refsource_MISC
-
https://github.com/Ruia-ruia/Exploits/blob/master/x11doublefree.sh x_refsource_MISC
IV. Related Vulnerabilities
Same product: libX11
-
CVE-2026-94285
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libX11 XkbGetMap Reply Heap-based Buffer Overflow -
CVE-2023-3138
X.Org libX11 缓冲区错误漏洞
Same vendor: The X11 Project
Same weakness: CWE-190
-
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V. Comments for CVE-2020-14363
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