The Remote Mount feature can potentially be abused by valid, authenticated users to make connections to internal services that may not normally be accessible to users. Internal service access controls, as applicable, remain in effect.
An information leak vulnerability in SMI Handler used to configure platform settings over WMI in some Lenovo models may allow an attacker with local access and elevated privileges to read SMM memory.
A buffer overflow in the WMI SMI Handler in some Lenovo models may allow an attacker with local access and elevated privileges to execute arbitrary code.
A buffer overflow exists in the Remote Presence subsystem which can potentially allow valid, authenticated users to cause a recoverable subsystem denial of service.
A valid, authenticated XCC user with read-only permissions can modify custom user roles on other user accounts and the user trespass message through the XCC CLI. There is no exposure if SSH is disabled or if there are no users assigned optional read-only permissions.
A valid XCC user's local account permissions overrides their active directory permissions under specific configurations. This could lead to a privilege escalation. To be vulnerable, LDAP must be configured for authentication/authorization and logins configured as “Local First, then LDAP”.
A valid LDAP user, under specific conditions, will default to read-only permissions when authenticating into XCC. To be vulnerable, XCC must be configured to use an LDAP server for Authentication/Authorization and have the login permission attribute not defined.
A valid, authenticated administrative user can query a web interface API to reveal the configured LDAP client password used by XCC to authenticate to an external LDAP server in certain configurations. There is no exposure where no LDAP client password is configured
A valid, authenticated user may be able to trigger a denial of service of the XCC web user interface or other undefined behavior through a format string injection vulnerability in a web interface API.
A valid, authenticated XCC user with read only access may gain elevated privileges through a specifically crafted API call.
In Lenovo systems, SMM BIOS Write Protection is used to prevent writes to SPI Flash. While this provides sufficient protection, an additional layer of protection is provided by SPI Protected Range Registers (PRx). Lenovo was notified that after resuming from S3 sleep mode in various versions of BIOS for Lenovo systems, the PRx is not set. This does not impact the SMM BIOS Write Protection, which keeps systems protected.
A potential vulnerability in the SMI callback function used in the System Lock Preinstallation driver in some Lenovo Notebook and ThinkStation models may allow arbitrary code execution.
Lenovo was notified of a potential denial of service vulnerability, affecting various versions of BIOS for Lenovo Desktop, Desktop - All in One, and ThinkStation, that could cause PCRs to be cleared intermittently after resuming from sleep (S3) on systems with Intel TXT enabled.
A potential vulnerability was reported in the SMI callback function of the OemSmi driver that may allow a local attacker with elevated permissions to execute arbitrary code.
A buffer overflow was reported in the LemSecureBootForceKey module in some Lenovo Desktop products that may allow a local attacker with elevated privileges to execute arbitrary code.
A buffer overflow was reported in the OemSmi module in some Lenovo Desktop products that may allow a local attacker with elevated privileges to execute arbitrary code.
A buffer overflow was reported in the BiosExtensionLoader module in some Lenovo Desktop products that may allow a local attacker with elevated privileges to execute arbitrary code.
A buffer overflow was reported in the SmiFlash module in some Lenovo Desktop products that may allow a local attacker with elevated privileges to execute arbitrary code.
A buffer overflow was reported in the SmuV11Dxe driver in some Lenovo Desktop products that may allow a local attacker with elevated privileges to execute arbitrary code.
A buffer overflow was reported in the SmuV11DxeVMR module in some Lenovo Desktop products that may allow a local attacker with elevated privileges to execute arbitrary code.
A buffer overflow was reported in the UpdateWMI module in some Lenovo Desktop products that may allow a local attacker with elevated privileges to execute arbitrary code.
A memory leakage vulnerability was reported in the SWSMIShadow DXE driver that may allow a local attacker with elevated privileges to write to NVRAM variables.
A memory leakage vulnerability was reported in the 534D0140 DXE driver that may allow a local attacker with elevated privileges to write to NVRAM variables.
A memory leakage vulnerability was reported in the 534D0740 DXE driver that may allow a local attacker with elevated privileges to write to NVRAM variables.
A memory leakage vulnerability was reported in the DustFilterAlertSmm SMM driver that may allow a local attacker with elevated privileges to write to NVRAM variables.
A memory leakage vulnerability was reported in the NvmramSmm SMM driver that may allow a local attacker with elevated privileges to write to NVRAM variables.
A buffer overflow was reported in the LEMALLDriversConnectedEventHook module in some Lenovo Desktop products that may allow a local attacker with elevated privileges to execute arbitrary code.
A buffer overflow was reported in the UltraFunctionTable module in some Lenovo Desktop products that may allow a local attacker with elevated privileges to execute arbitrary code.
A buffer over-read was reported in the LemSecureBootForceKey module in some Lenovo Desktop products that may allow a local attacker with elevated privileges to disclose sensitive information.
A buffer over-read was reported in the BiosExtensionLoader module in some Lenovo Desktop products that may allow a local attacker with elevated privileges to disclose sensitive information.