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Fencer Vulns
medium 4.0

CVE-2016-9844 json

Buffer overflow in the zi_short function in zipinfo.c in Info-Zip UnZip 6.0 allows remote attackers to cause a denial of service (crash) vi…

published 2017-01-18 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-10644

cvss
4.0
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

Buffer overflow in the zi_short function in zipinfo.c in Info-Zip UnZip 6.0 allows remote attackers to cause a denial of service (crash) via a large compression method value in the central directory file header.

Patch / fix

  • unzip Debian 14, Debian 13, Debian 12 6.0-21

debian advisories DEBIAN-CVE-2016-9844

  • unzip Ubuntu 16.04 LTS 6.0-20ubuntu1.1
  • unzip Ubuntu Pro 14.04 LTS 6.0-9ubuntu1.6

ubuntu advisories UBUNTU-CVE-2016-9844

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 SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 6.00-33.8.1
  • unzip SLES for SAP 11 SP4, SLES 11 SP4 6.00-11.17.1

suse advisories SUSE-SU-2018:2978-1SUSE-SU-2017:0639-1

  • unzip openSUSE Tumbleweed 6.00-39.1

opensuse advisories openSUSE-SU-2024:11485-1

  • unzip Alpine 3.24, Alpine 3.23, Alpine 3.22 +17 more 6.0-r3

alpine advisories ALPINE-CVE-2016-9844

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-35338AZL-6940

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

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-2016-9844 updated cvss 3.3

unzip: methbuf[] buffer overflow in zipinfo's zi_short()

  • Red Hat Enterprise Linux 5 unzip Red Hat Enterprise Linux 6 unzip Red Hat Enterprise Linux 7 unzip
    affected: no fix planned “Will not fix”

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

1.84% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 4.0 CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 2.0 2.1 AV:L/AC:L/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 Vulns 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.