cve/2021/CVE-2021-43396.md

### [CVE-2021-43396](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43396)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

** DISPUTED ** 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."

### POC

#### Reference
- https://sourceware.org/bugzilla/show_bug.cgi?id=28524
- https://www.oracle.com/security-alerts/cpujul2022.html

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/kenlavbah/log4jnotes