What is CVE-2021-31239?

CVE-2021-31239 is a high-severity software vulnerability (Out-of-bounds read) with a CVSS score of 7.5. An issue found in SQLite SQLite3 v.3.35.4 that allows a remote attacker to cause a denial of service via the appendvfs.c function.

Is CVE-2021-31239 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 2%.

What products does CVE-2021-31239 affect?

Tracked products affected include SQLite. Check the version you run to see whether it is affected.

How do I fix CVE-2021-31239?

Apply the vendor fix promptly. An official patch or advisory is available. Upgrade affected products to a fixed version.

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CVE-2021-31239

HIGH severity · CVSS 7.5 · Out-of-bounds read

7.5CVSS HIGH

Summary

An issue found in SQLite SQLite3 v.3.35.4 that allows a remote attacker to cause a denial of service via the appendvfs.c function.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

Confidentiality impactNone

Integrity impactNone

Availability impactHigh

Exploit probability (EPSS)2%

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products we track (1)

SQLite

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://github.com/Tsiming/Vulnerabilities/blob/main/SQLite/CVE-2021-31239 ↗

Additional information

NVD record
https://github.com/Tsiming/Vulnerabilities/blob/main/SQLite/CVE-2021-31239Patch
https://www.sqlite.org/cves.htmlAdvisory
https://www.sqlite.org/forum/forumpost/d9fce1a89bMitigation
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/73XUIHJ6UT75VFPDPLJOXJON7MVIKVZI/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FXFL4TDAH72PRCPD5UPZMJMKIMVOPLTI/
https://security.gentoo.org/glsa/202311-03
https://security.netapp.com/advisory/ntap-20230609-0010/