In Das U-Boot versions 2016.11-rc1 through 2019.07-rc4, an underflow can cause memcpy() to overwrite a very large amount of data (including the whole stack) while reading a crafted ext4 filesystem.
Weakness
The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| U-boot | Denx | 2016.09 (including) | 2019.04 (including) |
| U-boot | Denx | 2019.07 (including) | 2019.07 (including) |
| U-boot | Denx | 2019.07-rc1 (including) | 2019.07-rc1 (including) |
| U-boot | Denx | 2019.07-rc2 (including) | 2019.07-rc2 (including) |
| U-boot | Denx | 2019.07-rc3 (including) | 2019.07-rc3 (including) |
| U-boot | Denx | 2019.07-rc4 (including) | 2019.07-rc4 (including) |
| U-boot | Ubuntu | bionic | * |
| U-boot | Ubuntu | disco | * |
| U-boot | Ubuntu | eoan | * |
| U-boot | Ubuntu | esm-infra/bionic | * |
| U-boot | Ubuntu | esm-infra/focal | * |
| U-boot | Ubuntu | focal | * |
| U-boot | Ubuntu | trusty | * |
| U-boot | Ubuntu | upstream | * |
References
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00002.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00004.html
- https://gist.github.com/deephooloovoo/d91b81a1674b4750e662dfae93804d75
- https://github.com/u-boot/u-boot/commits/master
- https://lists.denx.de/pipermail/u-boot/2019-July/375514.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00002.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00004.html
- https://gist.github.com/deephooloovoo/d91b81a1674b4750e662dfae93804d75
- https://github.com/u-boot/u-boot/commits/master
- https://lists.denx.de/pipermail/u-boot/2019-July/375514.html