Paul Emge

**Name of the Vulnerable Software and Affected Versions** Das U-Boot versions 2016.11-rc1 through 2019.07-rc4 **Description** An underflow issue can cause the memcpy() function to overwrite a large amount of data, including the whole stack, when reading a crafted ext4 filesystem. **Recommendations** For Das U-Boot versions 2016.11-rc1 through 2019.07-rc4, consider avoiding the use of crafted ext4 filesystems until a fix is available. As a temporary workaround, restrict access to untrusted filesystems to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this issue.

**Name of the Vulnerable Software and Affected Versions** Das U-Boot versions 2019.07-rc1 through 2019.07-rc4 **Description** The issue allows for a double-free of a cached block of data when listing files in a crafted ext4 filesystem. **Recommendations** For Das U-Boot versions 2019.07-rc1 through 2019.07-rc4, at the moment, there is no information about a newer version that contains a fix for this issue.

**Name of the Vulnerable Software and Affected Versions** Das U-Boot versions 2016.09 through 2019.07-rc4 **Description** The issue arises when Das U-Boot attempts to read a crafted ext4 filesystem, leading to a stack buffer overflow due to excessive data being memset(). This overflow could potentially result in code execution. **Recommendations** For Das U-Boot versions 2016.09 through 2019.07-rc4, consider applying configuration changes to restrict access to untrusted ext4 filesystems until a fix is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** Das U-Boot versions prior to 2019.07-rc4 **Description** The issue arises when a crafted self-referential DOS partition table is encountered, leading to infinite recursion. This recursion causes the stack to grow indefinitely, which can result in a crash or the overwriting of other data. **Recommendations** For Das U-Boot versions prior to 2019.07-rc4, update to a version newer than 2019.07-rc4 to resolve the issue.