In SQLite 3.27.2, running fts5 prefix queries inside a transaction could trigger a heap-based buffer over-read in fts5HashEntrySort in sqlite3.c, which may lead to an information leak. This is related to ext/fts5/fts5_hash.c.

References

• https://nvd.nist.gov/vuln/detail/CVE-2019-9936
• https://lists.debian.org/debian-lts-announce/2020/08/msg00037.html
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EXD2GYJVTDGEQPUNMMMC5TB7MQXOBBMO/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N66U5PY5UJU4XBFZJH7QNKIDNAVIB4OP/
• https://security.gentoo.org/glsa/201908-09
• https://security.netapp.com/advisory/ntap-20190416-0005/
• https://sqlite.org/src/info/b3fa58dd7403dbd4
• https://usn.ubuntu.com/4019-1/
• https://www.mail-archive.com/sqlite-users@mailinglists.sqlite.org/msg114382.html
• https://www.mail-archive.com/sqlite-users@mailinglists.sqlite.org/msg114394.html
• https://www.oracle.com/security-alerts/cpujan2020.html
• https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
• http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00026.html
• http://www.securityfocus.com/bid/107562