CVE-2020-13435Public exploit

Process crash via window-function rewrite NULL dereference

Published May 24, 2020 · Updated Aug 4, 2024

Denial of service in SQLite 3.32.0 and earlier allows local users to crash an embedding process with a malicious SQL statement. During window-function query rewriting, sqlite3ExprCodeTarget uses an unadjusted Expr.op2 aggregation depth and dereferences a NULL pointer. Reachability requires the application to execute attacker-controlled SQL; the resulting segmentation fault interrupts only that process.

CVSS severity5.5
Medium
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in SQLite 3.32.0 and earlier allows local users to crash an embedding process with a malicious SQL statement. During window-function query rewriting, sqlite3ExprCodeTarget uses an unadjusted Expr.op2 aggregation depth and dereferences a NULL pointer. Reachability requires the application to execute attacker-controlled SQL; the resulting segmentation fault interrupts only that process.

The record

CVE
CVE-2020-13435
Published
May 24, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 24, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.1NIST NVDAV:L/AC:L/Au:N/C:N/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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