CVE-2021-29463 Out-of-bounds read in Exiv2::WebPImage::doWriteMetadata
An out-of-bounds read in Exiv2 allows attackers to cause a denial of service by crashing the application when writing metadata to a crafted image file.
- 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-2021-29463?
CVE-2021-29463 is a low-severity memory corruption vulnerability in Exiv2 Exiv2, published on 30 Apr 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. 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.
Weakness: CWE-125
Which versions are affected by CVE-2021-29463?
It affects 2 products.
Linux distribution packages (1)
exiv2 openSUSE:Tumbleweed | All versions | 0.27.5-6.1 |
Products include Exiv2 Exiv2, Fedoraproject Fedora.
How do I fix CVE-2021-29463?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-29463 being exploited?
There is no known exploitation of CVE-2021-29463 in the wild and no public exploit code.
Other vulnerabilities in Exiv2 Exiv2
Sources
Also known as AZL-7208, CLEANSTART-2024-PQ01694, DEBIAN-CVE-2021-29463, GHSA-5p8g-9xf3-gfrr, UBUNTU-CVE-2021-29463, openSUSE-SU-2024:12440-1.