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CVE-2021-37620

Published: 9 August 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 v0.27.4 and earlier. The out-of-bounds read is triggered when Exiv2 is used to read the metadata of a crafted image file. An attacker could potentially exploit the vulnerability to cause a denial of service, if they can trick the victim into running Exiv2 on a crafted image file. The bug is fixed in version v0.27.5.

Notes

AuthorNote
leosilva
a regression was reported in (LP: #1941752) and fixed in
USN-5043-2. It only affected focal, hirsute, impish and jammy.

Priority

Medium

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
exiv2
Launchpad, Ubuntu, Debian
impish
Released (0.27.3-3ubuntu4.1)
jammy
Released (0.27.3-3ubuntu4)
trusty Does not exist

upstream Needs triage

bionic
Released (0.25-3.1ubuntu0.18.04.11)
xenial
Released (0.25-2.1ubuntu16.04.7+esm4)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
focal
Released (0.27.2-8ubuntu2.7)
hirsute
Released (0.27.3-3ubuntu1.6)
Patches:
upstream: https://github.com/Exiv2/exiv2/pull/1769/commits/004f2a2447c3d5d1d178fb5d9e961a1b4c26dc98 (regression test)
upstream: https://github.com/Exiv2/exiv2/pull/1769/commits/2e7bb581a234bfb0d0c9e16a1dbf037a8c30681e (fix)
upstream: https://github.com/Exiv2/exiv2/pull/1769/commits/76e313745e813f80e8910aceb2210af3ad8cf897 (fix)

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H