CVE-2023-20578

A TOCTOU (Time-Of-Check-Time-Of-Use) in SMM may allow an attacker with ring0 privileges and access to the BIOS menu or UEFI shell to modify the communications buffer potentially resulting in arbitrary code execution. It has a CVSS v3.1 base score of 7.5 (HIGH).

CVE-2023-20578 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

CVE-2023-20578 affects products from amd, specifically: epyc_7001, epyc_7001_firmware, epyc_7203, epyc_7203_firmware, epyc_7203p, epyc_7203p_firmware, epyc_7232p, epyc_7232p_firmware, epyc_7251, epyc_7251_firmware, epyc_7252, epyc_7252_firmware, epyc_7261, epyc_7261_firmware, epyc_7262, epyc_7262_firmware, epyc_7272, epyc_7272_firmware, epyc_7281, epyc_7281_firmware, epyc_7282, epyc_7282_firmware, epyc_72f3, epyc_72f3_firmware, epyc_7301, epyc_7301_firmware, epyc_7302, epyc_7302_firmware, epyc_7302p, epyc_7302p_firmware, epyc_7303, epyc_7303_firmware, epyc_7303p, epyc_7303p_firmware, epyc_7313, epyc_7313_firmware, epyc_7313p, epyc_7313p_firmware, epyc_7343, epyc_7343_firmware, epyc_7351, epyc_7351_firmware, epyc_7351p, epyc_7351p_firmware, epyc_7352, epyc_7352_firmware, epyc_7371, epyc_7371_firmware, epyc_7373x, epyc_7373x_firmware, epyc_73f3, epyc_73f3_firmware, epyc_7401, epyc_7401_firmware, epyc_7401p, epyc_7401p_firmware, epyc_7402, epyc_7402_firmware, epyc_7402p, epyc_7402p_firmware, epyc_7413, epyc_7413_firmware, epyc_7443, epyc_7443_firmware, epyc_7443p, epyc_7443p_firmware, epyc_7451, epyc_7451_firmware, epyc_7452, epyc_7452_firmware, epyc_7453, epyc_7453_firmware, epyc_7473x, epyc_7473x_firmware, epyc_74f3, epyc_74f3_firmware, epyc_7501, epyc_7501_firmware, epyc_7502, epyc_7502_firmware, epyc_7502p, epyc_7502p_firmware, epyc_7513, epyc_7513_firmware, epyc_7532, epyc_7532_firmware, epyc_7542, epyc_7542_firmware, epyc_7543, epyc_7543_firmware, epyc_7543p, epyc_7543p_firmware, epyc_7551, epyc_7551_firmware, epyc_7551p, epyc_7551p_firmware, epyc_7552, epyc_7552_firmware, epyc_7573x, epyc_7573x_firmware, epyc_75f3, epyc_75f3_firmware, epyc_7601, epyc_7601_firmware, epyc_7642, epyc_7642_firmware, epyc_7643, epyc_7643_firmware, epyc_7643p, epyc_7643p_firmware, epyc_7662, epyc_7662_firmware, epyc_7663, epyc_7663_firmware, epyc_7663p, epyc_7663p_firmware, epyc_7702, epyc_7702_firmware, epyc_7702p, epyc_7702p_firmware, epyc_7713, epyc_7713_firmware, epyc_7713p, epyc_7713p_firmware, epyc_7742, epyc_7742_firmware, epyc_7763, epyc_7763_firmware, epyc_7773x, epyc_7773x_firmware, epyc_7f32, epyc_7f32_firmware, epyc_7f52, epyc_7f52_firmware, epyc_7f72, epyc_7f72_firmware, epyc_7h12, epyc_7h12_firmware, epyc_8024p, epyc_8024p_firmware, epyc_8024pn, epyc_8024pn_firmware, epyc_8124p, epyc_8124p_firmware, epyc_8124pn, epyc_8124pn_firmware, epyc_8224p, epyc_8224p_firmware, epyc_8224pn, epyc_8224pn_firmware, epyc_8324p, epyc_8324p_firmware, epyc_8324pn, epyc_8324pn_firmware, epyc_8434p, epyc_8434p_firmware, epyc_8434pn, epyc_8434pn_firmware, epyc_8534p, epyc_8534p_firmware, epyc_8534pn, epyc_8534pn_firmware, epyc_9124, epyc_9124_firmware, epyc_9174f, epyc_9174f_firmware, epyc_9184x, epyc_9184x_firmware, epyc_9224, epyc_9224_firmware, epyc_9254, epyc_9254_firmware, epyc_9274f, epyc_9274f_firmware, epyc_9334, epyc_9334_firmware, epyc_9354, epyc_9354_firmware, epyc_9354p, epyc_9354p_firmware, epyc_9374f, epyc_9374f_firmware, epyc_9384x, epyc_9384x_firmware, epyc_9454, epyc_9454_firmware, epyc_9454p, epyc_9454p_firmware, epyc_9474f, epyc_9474f_firmware, epyc_9534, epyc_9534_firmware, epyc_9554, epyc_9554_firmware, epyc_9554p, epyc_9554p_firmware, epyc_9634, epyc_9634_firmware, epyc_9654, epyc_9654_firmware, epyc_9654p, epyc_9654p_firmware, epyc_9684x, epyc_9684x_firmware, epyc_9734, epyc_9734_firmware, epyc_9754, epyc_9754_firmware, epyc_9754s, epyc_9754s_firmware. Check the affected products table above for specific version ranges.

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.