漏洞类别：RedHat
漏洞等级： 
漏洞信息
The System Security Services Daemon (SSSD) service provides a set of daemons to manage access to remote directories and authentication mechanisms.
It was found that sssd's sysdb_search_user_by_upn_res() function did not sanitize requests when querying its local cache and was vulnerable to injection. In a centralized login environment, if a password hash was locally cached for a given user, an authenticated attacker could use this flaw to retrieve it. (CVE-2017-12173)
Affected Products:
Red Hat Enterprise Linux Server 7 x86_64
Red Hat Enterprise Linux Server - Extended Update Support 7.4 x86_64
Red Hat Enterprise Linux Server - AUS 7.4 x86_64
Red Hat Enterprise Linux Workstation 7 x86_64
Red Hat Enterprise Linux Desktop 7 x86_64
Red Hat Enterprise Linux for IBM z Systems 7 s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.4 s390x
Red Hat Enterprise Linux for Power, big endian 7 ppc64
Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.4 ppc64
Red Hat Enterprise Linux for Scientific Computing 7 x86_64
Red Hat Enterprise Linux EUS Compute Node 7.4 x86_64
Red Hat Enterprise Linux for Power, little endian 7 ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.4 ppc64le
Red Hat Enterprise Linux Server - TUS 7.4 x86_64
Red Hat Enterprise Linux for ARM 64 7 aarch64
Red Hat Enterprise Linux for Power 9 7 ppc64le
Red Hat Enterprise Linux Server (for IBM Power LE) - 4 Year Extended Update Support 7.4 ppc64le
Red Hat Enterprise Linux Server - 4 Year Extended Update Support 7.4 x86_64
漏洞危害
An authenticated attacker could use this flaw to retrieve password.
解决方案
Upgrade to the latest packages which contain a patch. Refer to Applying Package Updates to RHEL system for details.
Refer to Red Hat security advisory RHSA-2017:3379 to address this issue and obtain more information.
Patch:
Following are links for downloading patches to fix the vulnerabilities:
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