Use-after-free in SQLite



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-20227
CWE-ID CWE-416
Exploitation vector Network
Public exploit N/A
Vulnerable software
 SQLite
Server applications / Database software

Vendor SQLite

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Use-after-free

EUVDB-ID: #VU51834

Risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-20227

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows an attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing SELECT queries in "src/select.c" if a subquery with both a correlated WHERE clause and a "HAVING 0" clause is used and the parent query is an aggregate. A remote attacker can execute a specially crafted query to trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

SQLite: 3.0.0 - 3.34.0

CPE2.3 External links

https://bugzilla.redhat.com/show_bug.cgi?id=1924886
https://security.gentoo.org/glsa/202103-04
https://www.sqlite.org/releaselog/3_34_1.html


Q & A

Can this vulnerability be exploited remotely?

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

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.

Is there known malware, which exploits this vulnerability?

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



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