CVE-2021-37616 Null pointer dereference in Exiv2::Internal::resolveLens0x8ff
Attackers can cause denial of service via crafted image files when Exiv2 prints interpreted metadata using specific command-line options.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-37616?
CVE-2021-37616 is a medium-severity vulnerability in Exiv2 Exiv2, published on 9 Aug 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-476
Which versions are affected by CVE-2021-37616?
It affects 2 products.
Products include Exiv2 Exiv2, Fedoraproject Fedora.
How do I fix CVE-2021-37616?
Upgrade to a fixed version.
Is CVE-2021-37616 being exploited?
There is no known exploitation of CVE-2021-37616 in the wild and no public exploit code.
Other vulnerabilities in Exiv2 Exiv2
Sources
Also known as AZL-7219, CLEANSTART-2024-FF55926, DEBIAN-CVE-2021-37616, GHSA-54f7-vvj7-545w, JLSEC-2026-1307, UBUNTU-CVE-2021-37616.