medium
5.5
CWE
476
Advisory Published
Updated

CVE-2021-37615: Null pointer dereference in Exiv2::Internal::resolveLens0x319

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. A null pointer dereference was found in Exiv2 versions v0.27.4 and earlier. The null pointer dereference 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 interpreted (translated) data, which is a less frequently used Exiv2 operation that requires an extra command line option (`-p t` or `-P t`). The bug is fixed in version v0.27.5.

Credit: security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
CentOS Dos2unix<=0.27.4
Fedora=33
Fedora=34

Remedy

https://github.com/Exiv2/exiv2/pull/1758

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-37615?

    The severity of CVE-2021-37615 is classified as medium due to the potential for null pointer dereference in Exiv2.

  • How do I fix CVE-2021-37615?

    To fix CVE-2021-37615, upgrade Exiv2 to version 0.27.5 or later to resolve the null pointer dereference issue.

  • Which versions of Exiv2 are affected by CVE-2021-37615?

    CVE-2021-37615 affects Exiv2 versions up to and including 0.27.4.

  • What impact does CVE-2021-37615 have on system security?

    CVE-2021-37615 can lead to application crashes or unexpected behavior when dealing with image metadata.

  • Is there a workaround for CVE-2021-37615?

    A temporary workaround for CVE-2021-37615 is to avoid using the vulnerable functionalities in Exiv2 until an upgrade is performed.

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