Bug 1841562 (CVE-2020-13630) - CVE-2020-13630 sqlite: Use-after-free in fts3EvalNextRow in ext/fts3/fts3.c
Summary: CVE-2020-13630 sqlite: Use-after-free in fts3EvalNextRow in ext/fts3/fts3.c
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-13630
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1841564 1841565 1841566 1845153 1845212
Blocks: 1841236
TreeView+ depends on / blocked
 
Reported: 2020-05-29 13:23 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-10-06 20:19 UTC (History)
13 users (show)

Fixed In Version: sqlite 3.32.0
Clone Of:
Environment:
Last Closed: 2020-11-04 02:25:33 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:4442 0 None None None 2020-11-04 00:59:53 UTC

Description Guilherme de Almeida Suckevicz 2020-05-29 13:23:34 UTC 
ext/fts3/fts3.c in SQLite before 3.32.0 has a use-after-free in fts3EvalNextRow, related to the snippet feature.

Reference and upstream commit:
https://sqlite.org/src/info/0d69f76f0865f962
Comment 1 Guilherme de Almeida Suckevicz 2020-05-29 13:24:06 UTC 
Created mingw-sqlite tracking bugs for this issue:

Affects: fedora-all [bug 1841564]


Created sqlite tracking bugs for this issue:

Affects: fedora-all [bug 1841566]


Created sqlite2 tracking bugs for this issue:

Affects: fedora-all [bug 1841565]
Comment 5 Mauro Matteo Cascella 2020-06-08 16:56:45 UTC 
This flaw was apparently introduced in SQLite upstream version 3.8.9 with the following commit:
  -> https://github.com/sqlite/sqlite/commit/18f6ff9eb7db02356102283c28053b0a602f55d7
Comment 6 Mauro Matteo Cascella 2020-06-08 17:10:21 UTC 
Statement:

This flaw did not affect the versions of SQLite as shipped with Red Hat Enterprise Linux 7 as they did not include the vulnerable code, which was introduced in a later version of the package.
Comment 7 Mauro Matteo Cascella 2020-06-08 17:48:39 UTC 
According to the documentation, FTS3 is an extension module that allows users to create special virtual tables with a built-in full-text index to efficiently perform full-text searches on a set of documents (https://www.sqlite.org/fts3.html). Under some circumstances it is possible for a SQL SELECT statement to cause a use-after-free while performing a full-text query on FTS3 virtual tables. Specifically, a new SegReader object can be allocated, free'd and then used in functions sqlite3Fts3SegReaderNew(), sqlite3Fts3SegReaderFree() and fts3SnippetAdvance() respectively. For this attack to be successful, an attacker would need to have a level of access that allows him to write particular SQL expressions that use the snippet function to perform full-text queries on FTS3 tables.
Comment 8 errata-xmlrpc 2020-11-04 00:59:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4442 https://access.redhat.com/errata/RHSA-2020:4442
Comment 9 Product Security DevOps Team 2020-11-04 02:25:33 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-13630
Comment 10 errata-xmlrpc 2021-05-18 16:30:07 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:1968 https://access.redhat.com/errata/RHSA-2021:1968
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