Bug 1841231 (CVE-2020-13435)

Summary:	CVE-2020-13435 sqlite: NULL pointer dereference in sqlite3ExprCodeTarget()
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	alex, databases-maint, drizt72, erik-fedora, fedora, itamar, mschorm, odubaj, pkubat, praiskup, rh-spice-bugs, rjones, wilmer5
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	sqlite 3.32.1	Doc Type:	If docs needed, set a value
Doc Text:	A NULL pointer dereference flaw was found in SQLite when rewriting select statements for window functions. This flaw allows an attacker who can execute SQL statements, to crash the application, resulting in a denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-28 11:00:03 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1841232, 1841233, 1841234, 1841235, 1846249, 1846260, 1846261
Bug Blocks:	1841236

Description Guilherme de Almeida Suckevicz 2020-05-28 16:48:10 UTC

SQLite through 3.32.0 has a segmentation fault in sqlite3ExprCodeTarget in expr.c.

Reference and upstream commit:
https://www.sqlite.org/src/info/7a5279a25c57adf1

Comment 1 Guilherme de Almeida Suckevicz 2020-05-28 16:48:50 UTC

Created mingw-sqlite tracking bugs for this issue:

Affects: fedora-all [bug 1841233]


Created sqlite tracking bugs for this issue:

Affects: fedora-all [bug 1841235]


Created sqlite2 tracking bugs for this issue:

Affects: epel-all [bug 1841232]
Affects: fedora-all [bug 1841234]

Comment 2 Mauro Matteo Cascella 2020-06-11 08:28:31 UTC

Upstream fix:
https://www.sqlite.org/src/info/ad7bb70af9bb68d1

Comment 6 Mauro Matteo Cascella 2020-06-11 12:23:54 UTC

Under some circumstances it is possible for a SQL expression to cause a NULL pointer dereference in sqlite3ExprCodeTarget() in expr.c, when the pInfo->aFunc struct pointer is set to 0. This may happen when rewriting a query for window functions, if the rewrite changes the depth of TK_AGG_FUNCTION nodes. An attacker would need to have a level of access that allows him to write particular SQL expressions to trigger this flaw, leading to a denial of service.

Comment 8 errata-xmlrpc 2021-11-09 18:36:59 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4396 https://access.redhat.com/errata/RHSA-2021:4396