Denial of service in SQLite

1) Out-of-bounds read

EUVDB-ID: #VU77807

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-31239

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition in ext/misc/appendvfs.c. A local user can trigger an out-of-bounds read error and crash the database.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

SQLite: 3.35.2 - 3.35.5

CPE2.3

• cpe:2.3:a:sqlite:sqlite:3.35.5:*:*:*:*:*:*:*
• cpe:2.3:a:sqlite:sqlite:3.35.4:*:*:*:*:*:*:*
• cpe:2.3:a:sqlite:sqlite:3.35.3:*:*:*:*:*:*:*

External links

http://github.com/Tsiming/Vulnerabilities/blob/main/SQLite/CVE-2021-31239
http://www.sqlite.org/forum/forumpost/d9fce1a89b
http://www.sqlite.org/src/info/04f6439f4d9b9b1f

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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