Bug 1769979 (CVE-2019-18408) - CVE-2019-18408 libarchive: use-after-free in archive_read_format_rar_read_data when there is an error in the decompression of an archive entry
Summary: CVE-2019-18408 libarchive: use-after-free in archive_read_format_rar_read_dat...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-18408
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1769980 1769981 1769982 1789502 1789503 1789505 1789506 1789507
Blocks: 1769983
TreeView+ depends on / blocked
 
Reported: 2019-11-07 20:39 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-09-07 20:57 UTC (History)
12 users (show)

Fixed In Version: libarchive 3.4.0
Doc Type: If docs needed, set a value
Doc Text:
A use-after-free vulnerability was discovered in libarchive in the way it processes RAR archives when there is an error in one of the archive's entries. An application that accepts untrusted RAR archives may be vulnerable to this flaw, which could allow a remote attacker to cause a denial of service or to potentially execute code.
Clone Of:
Environment:
Last Closed: 2020-01-22 20:09:31 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2020:0208 0 None None None 2020-01-23 03:04:11 UTC
Red Hat Product Errata RHBA-2020:0221 0 None None None 2020-01-23 17:38:24 UTC
Red Hat Product Errata RHBA-2020:0276 0 None None None 2020-01-29 12:28:49 UTC
Red Hat Product Errata RHBA-2020:0280 0 None None None 2020-01-29 14:54:03 UTC
Red Hat Product Errata RHBA-2020:0281 0 None None None 2020-01-29 15:08:59 UTC
Red Hat Product Errata RHBA-2020:0294 0 None None None 2020-01-30 09:09:52 UTC
Red Hat Product Errata RHBA-2020:0298 0 None None None 2020-01-30 11:01:42 UTC
Red Hat Product Errata RHBA-2020:0299 0 None None None 2020-01-30 10:55:38 UTC
Red Hat Product Errata RHBA-2020:0304 0 None None None 2020-01-30 15:44:22 UTC
Red Hat Product Errata RHBA-2020:0315 0 None None None 2020-02-03 01:41:16 UTC
Red Hat Product Errata RHBA-2020:0662 0 None None None 2020-03-03 21:25:13 UTC
Red Hat Product Errata RHSA-2020:0203 0 None None None 2020-01-22 14:09:34 UTC
Red Hat Product Errata RHSA-2020:0246 0 None None None 2020-01-27 20:26:44 UTC
Red Hat Product Errata RHSA-2020:0271 0 None None None 2020-01-29 07:59:23 UTC

Description Guilherme de Almeida Suckevicz 2019-11-07 20:39:12 UTC 
archive_read_format_rar_read_data in archive_read_support_format_rar.c in libarchive before 3.4.0 has a use-after-free in a certain ARCHIVE_FAILED situation, related to Ppmd7_DecodeSymbol.

Reference:
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=14689

Upstream commit:
https://github.com/libarchive/libarchive/commit/b8592ecba2f9e451e1f5cb7ab6dcee8b8e7b3f60
Comment 1 Guilherme de Almeida Suckevicz 2019-11-07 20:39:31 UTC 
Created libarchive tracking bugs for this issue:

Affects: fedora-all [bug 1769980]


Created libarchive3 tracking bugs for this issue:

Affects: epel-6 [bug 1769982]


Created mingw-libarchive tracking bugs for this issue:

Affects: fedora-all [bug 1769981]
Comment 4 Riccardo Schirone 2020-01-09 08:55:36 UTC 
While reading data from a RAR file in function archive_read_format_rar_read_data(), if the compression method used is COMPRESS_METHOD_BEST and there is an error while reading the compressed data, the rar->ppmd7_context is freed, but the logic is not instructed to not use that data for next compression entries. This leads to a use-after-free vulnerability in function read_data_compressed(), when rar->ppmd7_context is used again.

An application that uses libarchive to decompress untrusted RAR files may be vulnerable to this flaw, which would allow a remote attacker to cause the program to crash or possibly execute arbitrary code.
Comment 6 Riccardo Schirone 2020-01-09 17:52:38 UTC 
Statement:

This issue did not affect the versions of libarchive as shipped with Red Hat Enterprise Linux 6 as they did not include support for RAR archives.
Comment 8 Riccardo Schirone 2020-01-09 18:03:21 UTC 
RAR support added in libarchive v3.0.2 (see https://github.com/libarchive/libarchive/wiki/ReleaseNotes#libarchive-302).
Comment 9 Riccardo Schirone 2020-01-09 18:12:51 UTC 
Mitigation:

No known mitigation.
Comment 10 Rick 2020-01-09 19:32:16 UTC 
(In reply to Riccardo Schirone from comment #9)
> Mitigation:
> 
> No known mitigation.

What does "mitigation" mean here? 

Especially given,

> Riccardo Schirone 2020-01-09 09:09:19 UTC
> Fixed In Version: libarchive 3.4.0
Comment 11 errata-xmlrpc 2020-01-22 14:09:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:0203 https://access.redhat.com/errata/RHSA-2020:0203
Comment 12 Product Security DevOps Team 2020-01-22 20:09:31 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-2019-18408
Comment 13 errata-xmlrpc 2020-01-27 20:26:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

Via RHSA-2020:0246 https://access.redhat.com/errata/RHSA-2020:0246
Comment 15 errata-xmlrpc 2020-01-29 07:59:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:0271 https://access.redhat.com/errata/RHSA-2020:0271
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