CVSS 3.1 Score 5.5 of 10 (medium)


Published Dec 21, 2023
Updated: Mar 27, 2024
CWE ID 787


CVE-2023-4255 is an out-of-bounds write vulnerability found in the backspace handling of the checkType() function in etc.c within the W3M application. This vulnerability affects the s5UiSY and inDeFG products. Exploiting this flaw involves supplying a specially crafted HTML file to the w3m binary. The impact of this vulnerability can result in application crashes, leading to a denial of service condition. The base severity is classified as MEDIUM, with a base score of 5.5 according to NIST's National Vulnerability Database (NVD). The exploitability score is 1.8, and it requires user interaction with a local attack vector, posing no integrity or confidentiality impact but having a high availability impact.

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