A vulnerability in System Security Services Daemon (SSSD) could allow a local attacker to access sensitive information on a targeted system.
The vulnerability is due to improper security restrictions imposed by the affected software when creating a UNIX pipe used for communication between sudo and the sssd-sudo responder. An attacker who is able to send a message using the same raw protocol used by sudo and SSSD could exploit this vulnerability to access sensitive information, such as sudo rules for other users. A successful exploit could be used to conduct further attacks.
Fedoraproject.org has confirmed the vulnerability and released software updates.
To exploit this vulnerability, the attacker must have user-level access to the targeted system. This access requirement may reduce the likelihood of a successful exploit.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to access local systems.
Administrators are advised to allow only privileged users to access administration or management systems.
Administrators are advised to monitor critical systems.
Fedoraproject.org has released an issue report at the following link: Issue #3766
Fedoraproject.org has released software updates at the following link: SSSD 1.16.3
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.