Debian DSA-4104-1 : p7zip - security update

high Nessus Plugin ID 106593


The remote Debian host is missing a security-related update.


'landave' discovered a heap-based buffer overflow vulnerability in the NCompress::NShrink::CDecoder::CodeReal method in p7zip, a 7zr file archiver with high compression ratio. A remote attacker can take advantage of this flaw to cause a denial-of-service or, potentially the execution of arbitrary code with the privileges of the user running p7zip, if a specially crafted shrinked ZIP archive is processed.


Upgrade the p7zip packages.

For the oldstable distribution (jessie), this problem has been fixed in version 9.20.1~dfsg.1-4.1+deb8u3.

For the stable distribution (stretch), this problem has been fixed in version 16.02+dfsg-3+deb9u1.

See Also

Plugin Details

Severity: High

ID: 106593

File Name: debian_DSA-4104.nasl

Version: 3.5

Type: local

Agent: unix

Published: 2/5/2018

Updated: 11/13/2018

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information


Risk Factor: Medium

Score: 6.7


Risk Factor: Medium

Base Score: 6.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P


Risk Factor: High

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:p7zip, cpe:/o:debian:debian_linux:8.0, cpe:/o:debian:debian_linux:9.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Patch Publication Date: 2/4/2018

Reference Information

CVE: CVE-2017-17969

DSA: 4104