Microchip ASF4 integer overflows in flash_read, flash_write and flash_append
| CENSUS ID: | CENSUS-2020-0005 |
| CVE ID: | CVE-2019-16127 |
| Affected Products: | ASF4 as distributed through start.atmel.com (last accessed 2020-10-21) |
| Class: | Integer Overflow or Wraparound (CWE-190) |
| Discovered by: | George Poulios |
CENSUS identified several integer overflow problems in the flash_read, flash_write and flash_append functions of the Microchip ASF4 framework. This framework is used during firmware development for Atmel (now Microchip) microcontrollers. An adversary may abuse these issues to gain unauthorized read or write access to arbitrary pages of the flash storage, especially pages mapped at low memory addresses. As no patch is available from the vendor, CENSUS urges developers to implement a check for integer overflows in the relevant code.
Microchip cryptoauthlib atcab_genkey_base buffer overflow
| CENSUS ID: | CENSUS-2020-0004 |
| CVE ID: | CVE-2019-16129 |
| Affected Products: | cryptoauthlib versions prior to "20191122" |
| Class: | Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')(CWE-120) |
| Discovered by: | George Poulios |
CENSUS identified a buffer overflow vulnerability in the atcab_genkey_base function of the cryptoauthlib library. This library is part of the standard SDK provided by Microchip and is used to drive the operation of cryptographic co-processors sold by the vendor, such as the ATECC608A. An attacker with physical access to an embedded device where a microcontroller unit executes a vulnerable version of this library, may be able to execute arbitrary code on the microcontroller, by supplying malicious input to the microcontroller. Affected manufacturers of embedded systems that use Microchip cryptographic co-processors, are strongly recommended to update to at least version "20191122" of the "cryptoauthlib" library.
Microchip cryptoauthlib atcab_sign_base buffer overflow
| CENSUS ID: | CENSUS-2020-0003 |
| CVE ID: | CVE-2019-16128 |
| Affected Products: | cryptoauthlib versions prior to "20191122" |
| Class: | Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')(CWE-120) |
| Discovered by: | George Poulios |
CENSUS identified a buffer overflow vulnerability in the atcab_sign_base function of the cryptoauthlib library. This library is part of the standard SDK provided by Microchip and is used to drive the operation of cryptographic co-processors sold by the vendor, such as the ATECC608A. An attacker with physical access to an embedded device where a microcontroller unit executes a vulnerable version of this library, may be able to execute arbitrary code on the microcontroller, by supplying malicious input to the microcontroller. Affected manufacturers of embedded systems that use Microchip cryptographic co-processors, are strongly recommended to update to at least version "20191122" of the "cryptoauthlib" library.
Samsung Hypervisor (RKP) arbitrary zero write
| CENSUS ID: | CENSUS-2020-0002 |
| CVE ID: | CVE-2019-19273 |
| Samsung ID: | SVE-2019-16265 (Look for SVE-2019-16265) |
| Affected Products: | Samsung mobile devices running Android O(8.0) and P(9.0) with Exynos 8895 chipset (tested on S8 and Note8 firmware) |
| Class: | "Write What Where" Condition where "What" is always zero (CWE-123) |
| Discovered by: | Aristeidis Thallas |
CENSUS identified a bug in RKP, the Samsung EL2 Hypervisor implementation. The bug allows to write the zero 64-bit value to an arbitrary memory address. For the bug to be triggered, code execution is required in the context of the EL1 kernel. The bug was verified on the Samsung S8 and Note8 devices and was fixed by Samsung in the "SMR February-2020 Release 1". The bug may allow an adversary with kernel execution access to circumvent established security controls through the corruption of device memory. Users are urged to follow the latest security updates offered by Samsung for their mobile devices.