CVE-2017-5418

CVE-2017-5418 describes an out-of-bounds read vulnerability in Firefox and Thunderbird versions prior to 52, occurring during the parsing of HTTP digest authorization responses. This flaw allows for information leakage by reading arbitrary memory locations that match specific patterns. Rated as Medium severity (CVSS 5.3), it is a network-exploitable vulnerability with low attack complexity, requiring no user interaction or privileges, and primarily impacts confidentiality. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.