title: accountsservice .pam_environment infinite loop
description: 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.
problem types: CWE-20 Improper Input Validation
affected:
{
product: accountsservice
vendor: Freedesktop
versions:
lessThan: 0.6.35-0ubuntu7.3+esm2, status: affected, version: 0.6.35-0ubuntu7.3, versionType: custom
lessThan: 0.6.40-2ubuntu11.6, status: affected, version: 0.6.40-2ubuntu11, versionType: custom
lessThan: 0.6.45-1ubuntu1.3, status: affected, version: 0.6.45-1ubuntu1, versionType: custom
lessThan: 0.6.55-0ubuntu12~20.04.4, status: affected, version: 0.6.55-0ubuntu, versionType: custom
lessThan: 0.6.55-0ubuntu13.2, status: affected, version: 0.6.55-0ubuntu13, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: LOCAL
availabilityImpact: LOW
baseScore: 2.8
baseSeverity: LOW
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
version: 3.1
]