Pypdf is a free and open-source pure-python PDF library. Insufficient Verification of Data Authenticity vulnerability in Mitsubishi Electric Corporation MELSEC-F Series main modules and MELSEC iQ-F Series CPU modules allows a remote unauthenticated attacker to reset the memory of the products to factory default state and cause denial-of-service (DoS) condition on the products by sending specific packets. This resulted in no speculative execution workarounds being installed on CPU 0. On CPU 0 the check for the SMCCC workaround is called before SMCCC support has been initialized. This could be used by a malicious actor to perform denial of service type attack. In Eclipse Mosquito before and including 2.0.5, establishing a connection to the mosquitto server without sending data causes the EPOLLOUT event to be added, which results excessive CPU consumption.
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