A vulnerability, which was classified as critical, was found in libheif 1.4.0. Affected is the function heif::HeifContext::Image::set_alpha_channel of the file heif_context.h. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

libheif 1.4.0 has a use-after-free in heif::HeifContext::Image::set_alpha_channel in heif_context.h because heif_context.cc mishandles references to non-existing alpha images.

The bug was discovered 04/14/2019. The weakness was released 04/23/2019. This vulnerability is traded as CVE-2019-11471 since 04/23/2019. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 9 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Entries connected to this vulnerability are available at VDB-179330, VDB-179374, VDB-185998 and VDB-221713.

Productinfo

Name

• libheif

Version

• 1.4.0

License

• open-source

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CPE 2.2info

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