#VU23914 NULL pointer dereference in SQLite - CVE-2019-19923

Vulnerability identifier: #VU23914

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-19923

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SQLite
Server applications / Database software

Vendor: SQLite

Description

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

The vulnerability exists due to flattenSubquery in "select.c" mishandles certain uses of SELECT DISTINCT involving a LEFT JOIN in which the right-hand side is a view. A remote attacker can cause a NULL pointer dereference and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SQLite: 3.30.1

---

External links
https://github.com/sqlite/sqlite/commit/396afe6f6aa90a31303c183e11b2b2d4b7956b35

---

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.