---
id: CVE-2018-1000880
title: >-
  libarchive version commit 9693801580c0cf7c70e862d305270a16b52826a7 onwards
  (release v3.2.0 onwards) contains a CWE-20: Improper Input Validation
  vulnerability in WARC parser - libarchive/archive_read_support_format_warc.c,
  _warc_read() t…
summary: >-
  libarchive version commit 9693801580c0cf7c70e862d305270a16b52826a7 onwards
  (release v3.2.0 onwards) contains a CWE-20: Improper Input Validation
  vulnerability in WARC parser - libarchive/archive_read_support_format_warc.c,
  _warc_read() t…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-119
  - CWE-20
vendor: libarchive
product: libarchive
affected:
  - 'libarchive >= 3.2.0, < 3.4.0'
  - ubuntu_linux = 14.04
  - ubuntu_linux = 16.04
  - ubuntu_linux = 18.04
  - ubuntu_linux = 18.10
  - fedora = 29
  - fedora = 30
  - leap = 15.0
patched:
  - libarchive 3.4.0
published: '2018-12-20'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T21:17:07.197'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2018-1000880'
references:
  - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00055.html'
    label: cve@mitre.org
  - url: 'http://www.securityfocus.com/bid/106324'
    label: cve@mitre.org
  - url: 'https://bugs.launchpad.net/ubuntu/+source/libarchive/+bug/1794909'
    label: cve@mitre.org
  - url: 'https://github.com/libarchive/libarchive/pull/1105'
    label: cve@mitre.org
  - url: >-
      https://github.com/libarchive/libarchive/pull/1105/commits/9c84b7426660c09c18cc349f6d70b5f8168b5680
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CBOCC2M6YGPZA6US43YK4INPSJZZHRTG/
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W645KCLWFDBDGFJHG57WOVXGE62QSIJI/
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZVXA7PHINVT6DFF6PRLTDTVTXKDLVHNF/
    label: cve@mitre.org
  - url: 'https://usn.ubuntu.com/3859-1/'
    label: cve@mitre.org
  - url: 'https://www.debian.org/security/2018/dsa-4360'
    label: cve@mitre.org
  - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00055.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.securityfocus.com/bid/106324'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugs.launchpad.net/ubuntu/+source/libarchive/+bug/1794909'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/libarchive/libarchive/pull/1105'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://github.com/libarchive/libarchive/pull/1105/commits/9c84b7426660c09c18cc349f6d70b5f8168b5680
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CBOCC2M6YGPZA6US43YK4INPSJZZHRTG/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W645KCLWFDBDGFJHG57WOVXGE62QSIJI/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZVXA7PHINVT6DFF6PRLTDTVTXKDLVHNF/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://usn.ubuntu.com/3859-1/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.debian.org/security/2018/dsa-4360'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-1000880.json
  - url: 'https://access.redhat.com/security/cve/CVE-2018-1000880'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=1663892'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2018-1000880'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2018-1000880'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.04056
epssPercentile: 0.90389
ingestedAt: '2026-10-08T22:11:53.695Z'
scores:
  nvd: 6.5
  vendor: 4.3
---

## Overview

libarchive version commit 9693801580c0cf7c70e862d305270a16b52826a7 onwards (release v3.2.0 onwards) contains a CWE-20: Improper Input Validation vulnerability in WARC parser - libarchive/archive_read_support_format_warc.c, _warc_read() that can result in DoS - quasi-infinite run time and disk usage from tiny file. This attack appear to be exploitable via the victim must open a specially crafted WARC file.

## Affected

- `libarchive >= 3.2.0, < 3.4.0`
- `ubuntu_linux = 14.04`
- `ubuntu_linux = 16.04`
- `ubuntu_linux = 18.04`
- `ubuntu_linux = 18.10`
- `fedora = 29`
- `fedora = 30`
- `leap = 15.0`

## Remediation

Upgrade past the affected range:

- `libarchive 3.4.0`

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 8 · no fix planned: Red Hat Enterprise Linux 8 · updated 2026-10-08 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-1000880.json)