CVE-2021-37618: Out-of-bounds read in Exiv2::Jp2Image::printStructure
First published: Mon Aug 09 2021(Updated: )
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 print 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. Note that this bug is only triggered when printing the image ICC profile, which is a less frequently used Exiv2 operation that requires an extra command line option (`-p C`). The bug is fixed in version v0.27.5.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| CentOS Dos2unix | <=0.27.4 | |
| Fedora | =33 | |
| Fedora | =34 |
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Reference Links
- https://github.com/Exiv2/exiv2/pull/1759
- https://github.com/Exiv2/exiv2/security/advisories/GHSA-583f-w9pm-99r2
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FMDT4PJB7P43WSOM3TRQIY3J33BAFVVE/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UYGDELIFFJWKUU7SO3QATCIXCZJERGAC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FMDT4PJB7P43WSOM3TRQIY3J33BAFVVE/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UYGDELIFFJWKUU7SO3QATCIXCZJERGAC/
- https://security.gentoo.org/glsa/202312-06
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1992166
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1992167
- https://access.redhat.com/errata/RHSA-2021:4173
- https://access.redhat.com/errata/RHSA-2021:4319
- https://access.redhat.com/security/cve/cve-2021-37618
- https://bugzilla.redhat.com/show_bug.cgi?id=1992165
Frequently Asked Questions
What is the severity of CVE-2021-37618?
CVE-2021-37618 has been classified as a medium severity vulnerability due to the potential risk of information disclosure.
How does CVE-2021-37618 affect Exiv2?
CVE-2021-37618 affects Exiv2 versions v0.27.4 and earlier, enabling an out-of-bounds read when handling crafted image metadata.
How do I fix CVE-2021-37618?
To fix CVE-2021-37618, you should upgrade Exiv2 to version 0.27.5 or later, where the vulnerability is resolved.
Which software is impacted by CVE-2021-37618?
CVE-2021-37618 impacts Exiv2 as well as Fedora versions 33 and 34, which include vulnerable versions of the Exiv2 library.
What causes the vulnerability in CVE-2021-37618?
The vulnerability in CVE-2021-37618 is caused by an out-of-bounds read triggered when Exiv2 prints metadata from specially crafted image files.
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