SQLite before 3.54.0 built with FTS5 contains a heap buffer overflow in fts5DoSecureDelete() that allows attackers to write past the leaf page buffer

Summary

SQLite before 3.54.0 built with FTS5 contains a heap buffer overflow in fts5DoSecureDelete() that allows attackers to write past the leaf page buffer via crafted footer key offsets. Attackers can supply a database file with a corrupted FTS5 index that, when deleted from with secure-delete enabled, corrupts heap memory and crashes the application.

Remediation

1. Inventory every Sqlite Sqlite deployment, including staging.
2. Upgrade Sqlite Sqlite to 3.54.0.
3. Confirm the running version after the upgrade.

References

• Patchhttps://github.com/sqlite/sqlite/blob/version-3.53.4/ext/fts5/fts5_index.c#L5525
• Patchhttps://github.com/sqlite/sqlite/commit/d9de6eedbe918c074c7556400fa21df5960704d9
• Patchhttps://sqlite.org/src/info/9cd4f9e920
• Advisoryhttps://abraxaslabs.tech/research/sqlite-fts5-securedel
• Advisoryhttps://www.vulncheck.com/advisories/sqlite-before-3.54.0-heap-buffer-overflow-via-fts5-fts5dosecuredelete
• Referencehttps://github.com/sqlite/sqlite
• Referencehttps://sqlite.org/releaselog/3_54_0.html