CVE-2020-15999

A heap buffer overflow leading to out-of-bounds write was found in freetype. Memory allocation based on truncated PNG width and height values allows for an out-of-bounds write to occur in application memory when an attacker supplies a specially crafted TTF file.

Although firefox and thunderbird, as shipped with Red Hat Enterprise Linux 6, bundle a version (2.4.11) of freetype in gtk3-private, the version is not affected by this flaw because the vulnerable code was introduced in a subsequent version of freetype. The freetype package shipped with Red Hat Enterprise Linux 5 and 6 is not affected as the vulnerable code was introduced in a subsequent version of freetype.

go-freetype as shipped with Red Hat Advanced Cluster Management for Kubernetes is not affected by this flaw because it ships a pure go implementation of freetype which does not include the vulnerable code.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.