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. References: https://github.com/Exiv2/exiv2/security/advisories/GHSA-57jj-75fm-9rq5 https://github.com/Exiv2/exiv2/issues/1530 Upstream patch: https://github.com/Exiv2/exiv2/pull/1536
Created exiv2 tracking bugs for this issue: Affects: fedora-all [bug 1952608]
Flaw summary: In CrwMap::encode0x1810 of src/crwimage_int.cpp, there exists an integer overflow which can lead to an out-of-bounds read. This is due to an improper size comparison that checks `if (cc && cc->size() > size)` but does not check for `if (cc->size() < size)`. The upstream patch introduces the latter check to prevent this.
External References: https://github.com/Exiv2/exiv2/security/advisories/GHSA-57jj-75fm-9rq5
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:4173 https://access.redhat.com/errata/RHSA-2021:4173