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Fencer Intel
medium 6.5

CVE-2018-6540 json

In ZZIPlib 0.13.67, there is a bus error caused by loading of a misaligned address in the zzip_disk_findfirst function of zzip/mmapped.c.

published 2018-02-02 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-18292

cvss
6.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.3%
EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits
0
none known

Summary

In ZZIPlib 0.13.67, there is a bus error caused by loading of a misaligned address in the zzip_disk_findfirst function of zzip/mmapped.c. Remote attackers could leverage this vulnerability to cause a denial of service via a crafted zip file.

Patch / fix

  • zziplib Debian 14, Debian 13, Debian 12 0.13.62-3.2

debian advisories DEBIAN-CVE-2018-6540

  • zziplib Ubuntu 14.04 LTS 0.13.62-2ubuntu0.2
  • zziplib Ubuntu 16.04 LTS 0.13.62-3ubuntu0.16.04.2
  • zziplib Ubuntu 18.04 LTS 0.13.62-3.1ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2018-6540

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

  • zziplib SLED 12 SP3, SLED 12 SP2, SLE Workstation Extension 12 SP3 +3 more 0.13.67-10.5.1

suse advisories SUSE-SU-2018:0548-1

  • zziplib openSUSE Tumbleweed 0.13.72-1.4

opensuse advisories openSUSE-SU-2024:11546-1

  • zziplib Arch Linux 0.13.68-1

arch linux advisories AVG-667

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-2018-6540 updated cvss 3.3

zziplib: bus error in zzip_disk_findfirst function in zzip/mmapped.c

  • Red Hat Enterprise Linux 7 zziplib, zziplib-utils
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 8 zziplib, zziplib-utils
    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

2.26% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/gdraheim/zziplib/issues/15 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 6.5 CVSS:3.0/AV:N/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

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.