#VU23791 Infinite loop in SQLite - CVE-2019-19645

Vulnerability identifier: #VU23791

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-19645

CWE-ID: CWE-835

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 infinite loop in alter.c that can be triggered via certain types of self-referential views in conjunction with ALTER TABLE statements. A remote attacker can consume all available system resources and cause denial of service conditions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SQLite: 3.25.0 - 3.30.1

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External links
https://github.com/sqlite/sqlite/commit/38096961c7cd109110ac21d3ed7dad7e0cb0ae06

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.