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CVE-2016-9844

Published: 18 January 2017

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.

Notes

AuthorNote
tyhicks
In Ubuntu, this is reduced to a DoS thanks to zipinfo being built
with -D_FORTIFY_SOURCE=2
See LP: #1643750 for a reproducer

Priority

Negligible

Cvss 3 Severity Score

4.0

Score breakdown

Status

Package Release Status
unzip
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic Not vulnerable
(6.0-21ubuntu1)
cosmic Not vulnerable

disco Not vulnerable

eoan Not vulnerable

focal Not vulnerable

upstream
Released (6.0-21)
yakkety Ignored
(end of life)
zesty Ignored
(end of life)
groovy Not vulnerable

precise Ignored
(end of life)
trusty
Released (6.0-9ubuntu1.6)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
xenial
Released (6.0-20ubuntu1.1)
This vulnerability is mitigated in part by the use of -D_FORTIFY_SOURCE=2 in Ubuntu.

Severity score breakdown

Parameter Value
Base score 4.0
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact Low
Vector CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L