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: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: 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   
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:
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:

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:

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