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Fencer Intel
medium 5.5

CVE-2018-18384 json

Info-ZIP UnZip 6.0 has a buffer overflow in list.c, when a ZIP archive has a crafted relationship between the compressed-size value and the…

published 8y ago modified 4mo ago also EUVD-2018-10115

cvss
5.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.6%
EPSS 2.6% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

Info-ZIP UnZip 6.0 has a buffer overflow in list.c, when a ZIP archive has a crafted relationship between the compressed-size value and the uncompressed-size value, because a buffer size is 10 and is supposed to be 12.

Patch / fix

  • unzip Debian 14, Debian 13, Debian 12 6.0-11

debian advisories DEBIAN-CVE-2018-18384

  • unzip Ubuntu Pro 14.04 LTS 6.0-9ubuntu1.6

ubuntu advisories UBUNTU-CVE-2018-18384

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • unzip RHEL 7 6.0-20.el7

red hat advisories RHSA-2019:2159

  • unzip SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +1 more 6.00-33.13.3
  • unzip SLE Module for Basesystem 15 6.00-4.8.13
  • unzip SLES for SAP 11 SP4, SLES 11 SP4 6.00-11.18.8.1

suse advisories SUSE-SU-2020:1796-1SUSE-SU-2019:0707-1SUSE-SU-2019:13984-1

  • unzip openSUSE Tumbleweed 6.00-39.1
  • unzip openSUSE Leap 15.0 6.00-lp150.8.3
  • unzip-rcc openSUSE Leap 15.0 6.00-lp150.8.3

opensuse advisories openSUSE-SU-2024:11485-1openSUSE-SU-2019:1117-1

  • unzip Alpine 3.11 6.0-r7
  • unzip Alpine 3.24, Alpine 3.23, Alpine 3.22 +10 more 6.0-r9

alpine advisories ALPINE-CVE-2018-18384

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • unzip Azure Linux 3.0 6.0-20
  • unzip CBL-Mariner 2.0 6.0-19

azure linux advisories AZL-35340AZL-6942

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

  • unzip Arch Linux 6.0-15

arch linux advisories AVG-611

Is CVE-2018-18384 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-18384 updated cvss 3.3

unzip: Buffer overflow in list.c resulting in a denial of service

  • Red Hat Enterprise Linux 5 unzip Red Hat Enterprise Linux 6 unzip
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) unzip 6.0-20.el7 Red Hat Enterprise Linux ComputeNode (v. 7) unzip 6.0-20.el7 Red Hat Enterprise Linux Server (v. 7) unzip 6.0-20.el7 Red Hat Enterprise Linux Workstation (v. 7) unzip 6.0-20.el7
    fixed: vendor fix RHSA-2019:2159
  • Red Hat Enterprise Linux 8 unzip
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.57% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugzilla.suse.com https://bugzilla.suse.com/show_bug.cgi?id=1110194 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.