CVEs-PoC/2021/CVE-2021-29458.md

### [CVE-2021-29458](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29458)
![](https://img.shields.io/static/v1?label=Product&message=exiv2&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%200.27.4%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-125%3A%20Out-of-bounds%20Read&color=brightgreen)

### Description

Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. An out-of-bounds read was found in Exiv2 versions v0.27.3 and earlier. The out-of-bounds read is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could potentially exploit the vulnerability to cause a denial of service by crashing Exiv2, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when writing the metadata, which is a less frequently used Exiv2 operation than reading the metadata. For example, to trigger the bug in the Exiv2 command-line application, you need to add an extra command-line argument such as insert. The bug is fixed in version v0.27.4.

### POC

#### Reference
- https://github.com/Exiv2/exiv2/pull/1536

#### Github
No PoCs found on GitHub currently.