#VU23188 Division by zero in SQLite - CVE-2019-16168

Vulnerability identifier: #VU23188

Vulnerability risk: Low

CVSSv4.0: 2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2019-16168

CWE-ID: CWE-369

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
SQLite
Server applications / Database software

Vendor: SQLite

Description

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a division by zero error within the whereLoopAddBtreeIndex in sqlite3.c due to improper input validation in the sqlite_stat1 sz field. A remote attacker can pass specially crafted data to the application, trigger division by zero error and crash the vulnerable application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SQLite: 3.20.0 - 3.29.0

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External links
https://www.mail-archive.com/sqlite-users@mailinglists.sqlite.org/msg116312.html
https://www.sqlite.org/src/info/e4598ecbdd18bd82945f6029013296690e719a62
https://www.sqlite.org/src/timeline?c=98357d8c1263920b

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.