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CVE-2021-3420

Quick assessment

Affected
n/a newlib
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.

Red Hat newlib libc是美国红帽（Red Hat）公司的一款主要用于嵌入式系统的C语言库。 newlib in versions prior to 4.0.0 存在安全漏洞，该漏洞源于内存分配函数mEMALIGn, pvALLOc, nano_memalign, nano_valloc, nano_pvalloc不当的溢出验证可能导致整数溢出，导致分配一个小缓冲区，然后导致基于堆的缓冲区溢出。

AI Predicted 8.1 Difficulty: Easy EPSS 2.10% · P81

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2021-3420

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in newlib in versions prior to 4.0.0. Improper overflow validation in the memory allocation functions mEMALIGn, pvALLOc, nano_memalign, nano_valloc, nano_pvalloc could case an integer overflow, leading to an allocation of a small buffer and then to a heap-based buffer overflow.
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
Red Hat newlib libc 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat newlib libc是美国红帽（Red Hat）公司的一款主要用于嵌入式系统的C语言库。 newlib in versions prior to 4.0.0 存在安全漏洞，该漏洞源于内存分配函数mEMALIGn, pvALLOc, nano_memalign, nano_valloc, nano_pvalloc不当的溢出验证可能导致整数溢出，导致分配一个小缓冲区，然后导致基于堆的缓冲区溢出。
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
- newlib newlib versions prior to 4.0.0 -

II. Public POCs for CVE-2021-3420

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III. Intelligence Information for CVE-2021-3420

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Vendor Advisories for CVE-2021-3420 (1)

Mailing List Discussions for CVE-2021-3420 (3)

Same Patch Batch · n/a · 2021-03-05 · 46 CVEs total

CVE-2020-28502 8.1 HIGH Arbitrary Code Injection
CVE-2020-28050 ZOHO ManageEngine Desktop Central 安全漏洞
CVE-2021-26962 Aruba AirWave Management Platform 命令注入漏洞
CVE-2021-27098 Andrew Harding SPIRE 信任管理问题漏洞
CVE-2021-26705 SquareBox CatDV Server 访问控制错误漏洞
CVE-2021-3377 ansi_up 跨站脚本漏洞
CVE-2021-28041 OpenSSH 资源管理错误漏洞
CVE-2021-28042 Deutsche Post Mailoptimizer 路径遍历漏洞
CVE-2021-27581 Kentico SQL注入漏洞
CVE-2021-28040 OSSEC 安全漏洞
CVE-2021-26970 Aruba AirWave Management Platform 命令注入漏洞
CVE-2021-26971 Aruba Networks AirWave Management Platform 安全漏洞
CVE-2021-26968 Aruba AirWave Management Platform 跨站脚本漏洞
CVE-2021-26967 Aruba AirWave Management Platform 跨站脚本漏洞
CVE-2021-26965 Aruba Networks AirWave Management Platform SQL注入漏洞
CVE-2020-35594 ZOHO ManageEngine ADManager Plus 跨站脚本漏洞
CVE-2021-26966 Aruba Networks AirWave Management Platform SQL注入漏洞
CVE-2021-26963 Aruba AirWave Management Platform 安全漏洞
CVE-2021-26964 Aruba AirWave Management Platform 安全漏洞
CVE-2021-26960 Aruba AirWave Management Platform 跨站请求伪造漏洞

Showing top 20 of 46 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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

V. Comments for CVE-2021-3420

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