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CVE-2021-3595

Quick assessment

Affected
n/a QEMU
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.

QEMU（Quick Emulator）是法国法布里斯-贝拉（Fabrice Bellard）个人开发者的一套模拟处理器软件。该软件具有速度快、跨平台等特点。 QEMU 的 slirp 存在缓冲区错误漏洞，该漏洞源于函数 tftp_input() 处理来宾的小于 tftp_t 结构大小的 tftp 协议请求的 udp 数据包时，它使用工作 mbuf 缓冲区外部的内存。此问题可能会导致对来宾的越界读取访问或间接内存泄露。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.32% · P25

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2021-3595

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
使用未经初始化的指针
Source: CVE Program / CVE List V5
Vulnerability Title
QEMU 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
QEMU（Quick Emulator）是法国法布里斯-贝拉（Fabrice Bellard）个人开发者的一套模拟处理器软件。该软件具有速度快、跨平台等特点。 QEMU 的 slirp 存在缓冲区错误漏洞，该漏洞源于函数 tftp_input() 处理来宾的小于 tftp_t 结构大小的 tftp 协议请求的 udp 数据包时，它使用工作 mbuf 缓冲区外部的内存。此问题可能会导致对来宾的越界读取访问或间接内存泄露。
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
- QEMU libslirp 4.6.0 -

II. Public POCs for CVE-2021-3595

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III. Intelligence Information for CVE-2021-3595

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Vendor Advisories for CVE-2021-3595 (3)

Mailing List Discussions for CVE-2021-3595 (4)

Same Patch Batch · n/a · 2021-06-15 · 16 CVEs total

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CVE-2021-28858 TP-Link TL-WPA4220 信息泄露漏洞
CVE-2020-29215 SourceCodester Employee Management System 跨站脚本漏洞
CVE-2020-29214 SourceCodester Alumni Management System SQL注入漏洞
CVE-2021-27388 Siemens SINAMICS SL150 输入验证错误漏洞
CVE-2021-33622 Singularity 代码问题漏洞
CVE-2021-33887 Peloton TTR01 数据伪造问题漏洞
CVE-2020-21316 ZrLog 跨站脚本漏洞
CVE-2021-34170 Bandai Namco FromSoftware Dark Souls III 安全漏洞
CVE-2021-34128 LaikeTui 代码问题漏洞
CVE-2021-34129 LaikeTui 路径遍历漏洞
CVE-2021-3592 QEMU 缓冲区错误漏洞
CVE-2021-3593 QEMU 缓冲区错误漏洞
CVE-2021-3594 QEMU 缓冲区错误漏洞

IV. Related Vulnerabilities

Same product: QEMU
Same vendor: n/a
Same weakness: CWE-824

V. Comments for CVE-2021-3595

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