CVE-2018-1000877

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 5%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

libarchive version commit 416694915449219d505531b1096384f3237dd6cc onwards (release v3.1.0 onwards) contains a CWE-415: Double Free vulnerability in RAR decoder - libarchive/archive_read_support_format_rar.c, parse_codes(), realloc(rar->lzss.window, new_size) with new_size = 0 that can result in Crash/DoS. This attack appear to be exploitable via the victim must open a specially crafted RAR archive.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
46(Track)
EG Risk 46/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation5% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
5%
EPSS %ILE
91%
KEV
Not listed

Published

December 20, 2018

Last Modified

November 21, 2024

Advisory Details (7)

Auto-updated Aug 7, 2026
Patch available. Sources: redhat, github_pr.
generic Patch Available

[SECURITY] [DLA 1612-1] libarchive security update

https://lists.debian.org/debian-lts-announce/2018/12/msg00011.html
github_pr

Fix various crash, memory corruption and infinite loop conditions

Fix merged in libarchive/libarchive PR #1105 on 2018-12-13 — awaiting tagged release

https://github.com/libarchive/libarchive/pull/1105/commits/021efa522ad729ff0f5806c4ce53e4a6cc1daa31
github_pr

Fix various crash, memory corruption and infinite loop conditions

Fix merged in libarchive/libarchive PR #1105 on 2018-12-13 — awaiting tagged release

https://github.com/libarchive/libarchive/pull/1105
generic

Bug #1794909 “Memory corruption in RAR decoder” : Bugs : libarchive package : Ubuntu

https://bugs.launchpad.net/ubuntu/+source/libarchive/+bug/1794909
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2019:3698
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2019:2298
generic

SecurityFocus

http://www.securityfocus.com/bid/106324

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibarchive13 (3.1.2-11ubuntu0.16.04.5) @ xenial2026-05-28ubuntu
redhatlibarchive-0:3.3.2-7.el82019-11-05redhat
redhatlibarchive-0:3.1.2-12.el72019-08-06redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 6 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.3.3-2—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.3.3-2—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.3.3-2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.3.3-2—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
libarchive3.1.2-11 ... 3.1.2-11+deb8u5 (7 versions)3.1.2-11+deb8u6—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
libarchive3.2.2-23.2.2-2+deb9u1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(3)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 4× in last 7d / 21× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 139 total refreshes for this CVE.

  1. 2026-09-17 19:22 UTCEPSS rescore
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Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2018-1000877?
CVE-2018-1000877 is a high vulnerability published on December 20, 2018. libarchive version commit 416694915449219d505531b1096384f3237dd6cc onwards (release v3.1.0 onwards) contains a CWE-415: Double Free vulnerability in RAR decoder - libarchive/archivereadsupportformatrar.c, parsecodes(), realloc(rar->lzss.window, newsize) with new_size = 0 that can result in…
When was CVE-2018-1000877 disclosed?
CVE-2018-1000877 was first published in the National Vulnerability Database on December 20, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-1000877 actively exploited?
CVE-2018-1000877 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5% probability of exploitation in the next 30 days, which ranks it in the top 8.8% of all scored CVEs.
What is the CVSS score of CVE-2018-1000877?
CVE-2018-1000877 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2018-1000877?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-1000877, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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