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CVE-2021-29470

Published: 23 April 2021

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.

Priority

Medium

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
exiv2
Launchpad, Ubuntu, Debian
impish
Released (0.27.3-3ubuntu2)
jammy
Released (0.27.3-3ubuntu2)
focal
Released (0.27.2-8ubuntu2.2)
groovy
Released (0.27.3-3ubuntu0.2)
hirsute
Released (0.27.3-3ubuntu1.1)
trusty Does not exist

upstream Needs triage

bionic Not vulnerable
(code not present)
xenial Not vulnerable
(code not present)
Patches:
upstream: https://github.com/Exiv2/exiv2/pull/1581/commits/6527e4f5979ced22d509e27d87d51287046f2008 (regression test)
upstream: https://github.com/Exiv2/exiv2/pull/1581/commits/6628a69c036df2aa036290e6cd71767c159c79ed (fix)

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H