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CVE-2021-3782

Quick assessment

Affected
n/a wayland
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.

Canonical Ubuntu Linux是英国科能软件（Canonical）公司的一套Linux操作系统。 Canonical Ubuntu Linux 存在安全漏洞，该漏洞源于错误地处理了某些对象的引用计数，从而导致拒绝服务。攻击者利用该漏洞可以执行任意代码。

AI Predicted 7.8 Difficulty: Hard EPSS 0.32% · P23
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I. Basic Information for CVE-2021-3782

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An internal reference count is held on the buffer pool, incremented every time a new buffer is created from the pool. The reference count is maintained as an int; on LP64 systems this can cause the reference count to overflow if the client creates a large number of wl_shm buffer objects, or if it can coerce the server to create a large number of external references to the buffer storage. With the reference count overflowing, a use-after-free can be constructed on the wl_shm_pool tracking structure, where values may be incremented or decremented; it may also be possible to construct a limited oracle to leak 4 bytes of server-side memory to the attacking client at a time.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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
Canonical Ubuntu Linux 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Canonical Ubuntu Linux是英国科能软件（Canonical）公司的一套Linux操作系统。 Canonical Ubuntu Linux 存在安全漏洞，该漏洞源于错误地处理了某些对象的引用计数，从而导致拒绝服务。攻击者利用该漏洞可以执行任意代码。
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
- wayland wayland 1.20.91 -

II. Public POCs for CVE-2021-3782

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III. Intelligence Information for CVE-2021-3782

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Other References for CVE-2021-3782 (1)

Same Patch Batch · n/a · 2022-09-23 · 79 CVEs total

CVE-2022-35246 Rocket.Chat 安全漏洞
CVE-2022-35248 Rocket.Chat 授权问题漏洞
CVE-2022-32220 Rocket.Chat 信息泄露漏洞
CVE-2022-35250 Rocket.Chat 安全漏洞
CVE-2022-35251 Rocket.Chat 跨站脚本漏洞
CVE-2022-35249 Rocket.Chat 信息泄露漏洞
CVE-2022-35893 Insyde InsydeH2O 输入验证错误漏洞
CVE-2022-40359 Google KFM 跨站脚本漏洞
CVE-2022-40358 Pydio 跨站脚本漏洞
CVE-2022-36338 Insyde InsydeH2O 安全漏洞
CVE-2022-32218 Rocket.Chat 信息泄露漏洞
CVE-2022-32226 Rocket.Chat 输入验证错误漏洞
CVE-2022-32227 Rocket.Chat 信息泄露漏洞
CVE-2022-32228 Rocket.Chat 安全漏洞
CVE-2022-32229 Rocket.Chat 安全漏洞
CVE-2022-35247 Rocket.Chat 安全漏洞
CVE-2022-30124 Rocket.Chat 授权问题漏洞
CVE-2022-32211 Rocket.Chat SQL注入漏洞
CVE-2022-32217 Rocket.Chat 日志信息泄露漏洞
CVE-2022-32219 Rocket.Chat 信息泄露漏洞

Showing top 20 of 79 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same vendor: n/a
Same weakness: CWE-190

V. Comments for CVE-2021-3782

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