A vulnerability was found in ToaruOS 1.10.10. It has been rated as critical. Affected by this issue is an unknown code of the file kernel/sys/syscall.c. The manipulation of the argument TOARU_SYS_FUNC_MMAP with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An integer wrap in kernel/sys/syscall.c in ToaruOS 1.10.10 allows users to map arbitrary kernel pages into userland process space via TOARU_SYS_FUNC_MMAP, leading to escalation of privileges.

The weakness was presented 06/29/2019. This vulnerability is handled as CVE-2019-13049 since 06/29/2019. The exploitation is known to be easy. Local access is required to approach this attack. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

See VDB-137077, VDB-137076 and VDB-137075 for similar entries.

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• ToaruOS

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• 1.10.10

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