giflib may dereference NULL or write out of bounds when processing malformed images, potentially resulting in Denial of Service or arbitrary code execution.
| Package | Arch | Vulnerable | Unaffected |
|---|---|---|---|
| media-libs/giflib | * | < 4.1.4 | >= 4.1.4 |
giflib is a library for reading and writing GIF images.
Chris Evans and Daniel Eisenbud independently discovered two out-of-bounds memory write operations and a NULL pointer dereference in giflib.
An attacker could craft a malicious GIF image and entice users to load it using an application making use of the giflib library, resulting in an application crash or potentially the execution of arbitrary code.
There is no known workaround at this time.
All giflib users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=media-libs/giflib-4.1.4"