Advisories

SQLite before 3.54.0 Use-After-Free in FTS3 fts3BestSnippet() via snippet()

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Severity
medium
Date
Affecting
  • SQLite >= 0, < 3.54.0

CWE
  • CWE-416 Use After Free
CVSS
6.8
CVSS V4 Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
Marc Heuse, Abraxas Labs, Dan Kennedy
Description
SQLite before 3.54.0 built with FTS3/FTS4 and SQLITE_ENABLE_FTS3_PARENTHESIS contains a use-after-free vulnerability in fts3BestSnippet() caused by dangling cached position-list pointers. Attackers can run a full-text MATCH query combining OR and NEAR operators with snippet() to read freed heap memory and crash the process.

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