CVE-1999-0556

Summary

CVE-1999-0556 is a vulnerability affecting Unix systems where two or more user accounts have the same User ID (UID). This condition can lead to account confusion and potential unauthorized access, as system administrators may mistakenly grant permissions intended for one account to another account with the same UID. An attacker could exploit this by gaining access to a system through a compromised account with a matching UID, thereby bypassing access controls and potentially gaining elevated privileges. System administrators should regularly check their systems for duplicate UIDs and assign unique identifiers to each account to mitigate this risk.

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