CVSS 3.1 Score 5.8 of 10 (medium)


Published Nov 1, 2023
Updated: Jan 25, 2024


CVE-2023-20270 is a vulnerability in the Server Message Block (SMB) protocol preprocessor and the Snort 3 detection engine for Cisco Firepower Threat Defense (FTD) Software. It affects several products, including srjKCm, srjKCl, srjKCk, o2P7xz, srjKCg, nGdMF1, o5Eh7R, o5Eh90, q6Du9Z, r6WizN, r6WizO, and r6WizP. The vulnerability allows an unauthenticated remote attacker to bypass policies or cause a denial of service (DoS) on an affected device. This is due to improper error-checking when processing SMB traffic. An attacker can exploit this by sending a crafted SMB packet stream. The impact score is 1.4 out of 10 and the base severity is rated as MEDIUM.

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