HOMEVULNERABILITIESCVE-2019-1000020
MEDIUM

CVE-2019-1000020

CWE-835Published: February 4, 2019· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official Description

libarchive version commit 5a98dcf8a86364b3c2c469c85b93647dfb139961 onwards (version v2.8.0 onwards) contains a CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in ISO9660 parser, archive_read_support_format_iso9660.c, read_CE()/parse_rockridge() that can result in DoS by infinite loop. This attack appears to be exploitable via the victim opening a specially crafted ISO9660 file.

NVD Source

Technical Analysis

CVE-2019-1000020 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected Vendors & Products

Canonical1 product(s)
ubuntu linux
Debian1 product(s)
debian linux
Fedora1 product(s)
fedora
libarchive1 product(s)
libarchive
openSUSE1 product(s)
leap
Red Hat3 product(s)
enterprise linux desktopenterprise linux serverenterprise linux workstation
Source: NVD CPE · 11 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/libarchive/libarchive/pull/1120/commits/8312eaa576014cd9b965012af51bc1f967b12423
PATCHhttps://github.com/libarchive/libarchive/pull/1120/commits/8312eaa576014cd9b965012af51bc1f967b12423
ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2019-04/msg00055.html
ADVISORYhttps://access.redhat.com/errata/RHSA-2019:2298
ADVISORYhttps://github.com/libarchive/libarchive/pull/1120
ADVISORYhttps://lists.debian.org/debian-lts-announce/2019/02/msg00013.html
ADVISORYhttps://usn.ubuntu.com/3884-1/
ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2019-04/msg00055.html
ADVISORYhttps://access.redhat.com/errata/RHSA-2019:2298
ADVISORYhttps://github.com/libarchive/libarchive/pull/1120
ADVISORYhttps://lists.debian.org/debian-lts-announce/2019/02/msg00013.html
ADVISORYhttps://usn.ubuntu.com/3884-1/

All References (22)

→
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00055.htmlMailing List · Third Party Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00012.html
→
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00015.html
→
https://access.redhat.com/errata/RHSA-2019:2298Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2019:3698
→
https://github.com/libarchive/libarchive/pull/1120Third Party Advisory
→
https://github.com/libarchive/libarchive/pull/1120/commits/8312eaa576014cd9b965012af51bc1f967b12423Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2019/02/msg00013.htmlThird Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CBOCC2M6YGPZA6US43YK4INPSJZZHRTG/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZVXA7PHINVT6DFF6PRLTDTVTXKDLVHNF/
→
https://usn.ubuntu.com/3884-1/Third Party Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00055.htmlMailing List · Third Party Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00012.html
→
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00015.html
→
https://access.redhat.com/errata/RHSA-2019:2298Third Party Advisory

Quick Facts

CVE IDCVE-2019-1000020
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-835
CISA KEVNo
Affected6 vendor(s)
PublishedFeb 4, 2019

Related CVEs (CWE-835)

CVE-2018-20784
9.8
CVE-2017-12997
9.8
CVE-2017-12995
9.8
CVE-2017-12990
9.8
CVE-2024-43366
9.1
CVE-2021-42143
9.1

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-1000020 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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