SB2019080643 - Stack-based buffer overflow in DENX U-Boot

Description

This security bulletin contains information about 1 security vulnerability.

1) Stack-based buffer overflow (CVE-ID: CVE-2019-13106)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when the ext4 code can overwrite portions of the stack with 0s in the "ext4fs_read_file" function. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.

This vulnerability can easily give complete control of the CPU, which would defeat verified boot

Remediation

Install update from vendor's website.

References

• https://gist.github.com/deephooloovoo/d91b81a1674b4750e662dfae93804d75
• https://github.com/u-boot/u-boot/commits/master
• https://lists.denx.de/pipermail/u-boot/2019-July/375516.html