CVE-2021-29463 Information

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.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Reference

https://github.com/Exiv2/exiv2/commit/783b3a6ff15ed6f82a8f8e6c8a6f3b84a9b04d4b https://github.com/Exiv2/exiv2/security/advisories/GHSA-5p8g-9xf3-gfrr https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/K3HKXR6JOVKMBE4HY4FDXNVZGNCQG6T3/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NDMZTVQAZSMLPTDVDYLBHAAF7I5QXVYQ/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5