Buffer Underflow Vulnerability in glibc's realpath() Function

CVE-2018-1000001 · HIGH Severity

AV:L/AC:L/AU:N/C:C/I:C/A:C

In glibc 2.26 and earlier there is confusion in the usage of getcwd() by realpath() which can be used to write before the destination buffer leading to a buffer underflow and potential code execution.

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