Bug 1805963 (CVE-2020-9308)

Summary:	CVE-2020-9308 libarchive: attempts to unpack a RAR5 file with an invalid or corrupted header leads to a SIGSEGV
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	besser82, databases-maint, ndevos, odubaj, panovotn, pkubat, praiskup, tomm.momi
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libarchive 3.4.2	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-03-24 16:31:55 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:	1805967, 1805968
Bug Blocks:	1805969

Description Guilherme de Almeida Suckevicz 2020-02-21 18:22:31 UTC

archive_read_support_format_rar5.c in libarchive before 3.4.2 attempts to unpack a RAR5 file with an invalid or corrupted header (such as a header size of zero), leading to a SIGSEGV or possibly unspecified other impact.

References:
https://github.com/libarchive/libarchive/pull/1326
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=20459

Upstream commit:
https://github.com/libarchive/libarchive/pull/1326/commits/94821008d6eea81e315c5881cdf739202961040a

Comment 1 Guilherme de Almeida Suckevicz 2020-02-21 18:26:30 UTC

Created libarchive tracking bugs for this issue:

Affects: fedora-all [bug 1805967]


Created libarchive3 tracking bugs for this issue:

Affects: epel-6 [bug 1805968]

Comment 2 Riccardo Schirone 2020-03-24 11:53:39 UTC

Support for RAR5 was introduced in libarchive 3.4.0 (see https://github.com/libarchive/libarchive/wiki/ReleaseNotes#libarchive-340).

Comment 3 Riccardo Schirone 2020-03-24 11:56:02 UTC

Statement:

This issue did not affect the versions of libarchive as shipped with Red Hat Enterprise Linux 6, 7, and 8 as they did not include support for RAR 5 archives.

Comment 4 Product Security DevOps Team 2020-03-24 16:31:55 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-2020-9308