An Ubuntu-specific modification to AccountsService in versions before 0.6.55-0ubuntu13.2, among other earlier versions, would perform unbounded read operations on user-controlled ~/.pam_environment files, allowing an infinite loop if /dev/zero is symlinked to this location.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.
Link | Tags |
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https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS | third party advisory exploit |