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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
Description
The _unix_run_helper_binary function in the pam_unix module in Linux-PAM (aka pam) before 1.2.1, when unable to directly access passwords, allows local users to enumerate usernames or cause a denial of service (hang) via a large password.
Metrics
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CVE Modified by Red Hat, Inc.5/13/2024 11:33:52 PM
Action
Type
Old Value
New Value
CVE Modified by Red Hat, Inc.2/12/2023 6:15:31 PM
Action
Type
Old Value
New Value
Removed
CVSS V2
Red Hat, Inc. (AV:N/AC:L/Au:N/C:P/I:N/A:P)
Changed
Description
It was discovered that the _unix_run_helper_binary() function of PAM's unix_pam module could write to a blocking pipe, possibly causing the function to become unresponsive. An attacker able to supply large passwords to the unix_pam module could use this flaw to enumerate valid user accounts, or cause a denial of service on the system.
The _unix_run_helper_binary function in the pam_unix module in Linux-PAM (aka pam) before 1.2.1, when unable to directly access passwords, allows local users to enumerate usernames or cause a denial of service (hang) via a large password.
CVE Modified by Red Hat, Inc.2/02/2023 10:16:45 AM
Action
Type
Old Value
New Value
Added
CVSS V2
Red Hat, Inc. (AV:N/AC:L/Au:N/C:P/I:N/A:P)
Changed
Description
The _unix_run_helper_binary function in the pam_unix module in Linux-PAM (aka pam) before 1.2.1, when unable to directly access passwords, allows local users to enumerate usernames or cause a denial of service (hang) via a large password.
It was discovered that the _unix_run_helper_binary() function of PAM's unix_pam module could write to a blocking pipe, possibly causing the function to become unresponsive. An attacker able to supply large passwords to the unix_pam module could use this flaw to enumerate valid user accounts, or cause a denial of service on the system.
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