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CVE-2021-43396

Quick assessment

Affected
n/a n/a
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.

GNU C Library（glibc，libc6）是一种按照LGPL许可协议发布的开源免费的C语言编译程序。glibc（GNU C Library）是GNU计划所实现的C标准库。 GNU C Library (又名 glibc) 2.34版本存在安全漏洞，该漏洞源于受影响版本库中iconvdata/iso-2022-jp-3.c的iconv()存在数据校验问题。远程攻击者可利用该漏洞通过精心制作的ISO-2022-JP-3数据强制iconv()发出一个虚假的0字符，并伴随着内部状态重置。在某些iconv

AI Predicted 5.3 Difficulty: Theoretical EPSS 3.29% · P88

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-43396

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In iconvdata/iso-2022-jp-3.c in the GNU C Library (aka glibc) 2.34, remote attackers can force iconv() to emit a spurious '\0' character via crafted ISO-2022-JP-3 data that is accompanied by an internal state reset. This may affect data integrity in certain iconv() use cases. NOTE: the vendor states "the bug cannot be invoked through user input and requires iconv to be invoked with a NULL inbuf, which ought to require a separate application bug to do so unintentionally. Hence there's no security impact to the bug.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
GNU C Library 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GNU C Library（glibc，libc6）是一种按照LGPL许可协议发布的开源免费的C语言编译程序。glibc（GNU C Library）是GNU计划所实现的C标准库。 GNU C Library (又名 glibc) 2.34版本存在安全漏洞，该漏洞源于受影响版本库中iconvdata/iso-2022-jp-3.c的iconv()存在数据校验问题。远程攻击者可利用该漏洞通过精心制作的ISO-2022-JP-3数据强制iconv()发出一个虚假的0字符，并伴随着内部状态重置。在某些iconv
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
- n/a n/a -

II. Public POCs for CVE-2021-43396

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-43396

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Vendor Advisories for CVE-2021-43396 (1)

Security Blog Posts for CVE-2021-43396 (1)

Other References for CVE-2021-43396 (2)

Same Patch Batch · n/a · 2021-11-04 · 12 CVEs total

CVE-2021-43400 BlueZ 资源管理错误漏洞
CVE-2020-25367 D-Link DIR-823G 命令注入漏洞
CVE-2020-25366 D-Link DIR-823G 安全漏洞
CVE-2020-25368 D-Link DIR-823G 命令注入漏洞
CVE-2021-42624 Miniftpd 安全漏洞
CVE-2021-43281 MyBB 代码注入漏洞
CVE-2021-43293 Sonatype Nexus Repository 代码问题漏洞
CVE-2021-43389 Linux kernel 缓冲区错误漏洞
CVE-2020-21139 EC Cloud E-Commerce System 跨站请求伪造漏洞
CVE-2021-43398 Crypto++ 安全漏洞
CVE-2021-42057 obsidian-dataview 代码注入漏洞

IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a

V. Comments for CVE-2021-43396

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