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Fencer Intel
high 7.8

CVE-2017-17969 json

Heap-based buffer overflow in the NCompress::NShrink::CDecoder::CodeReal method in 7-Zip before 18.00 and p7zip allows remote attackers to…

published 8y ago modified 4mo ago also EUVD-2017-9112

cvss
7.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.0%
EPSS 5.0% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

Heap-based buffer overflow in the NCompress::NShrink::CDecoder::CodeReal method in 7-Zip before 18.00 and p7zip allows remote attackers to cause a denial of service (out-of-bounds write) or potentially execute arbitrary code via a crafted ZIP archive.

Patch / fix

  • 7-zip 7-zip 18.00
  • 7-zip p7zip 18.0
  • p7zip Debian 13, Debian 12 16.02+dfsg-5

debian advisories DEBIAN-CVE-2017-17969

  • p7zip Ubuntu 14.04 LTS 9.20.1~dfsg.1-4+deb7u3build0.14.04.1
  • p7zip Ubuntu 16.04 LTS 9.20.1~dfsg.1-4.2ubuntu0.1

ubuntu advisories UBUNTU-CVE-2017-17969

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

  • p7zip SLES for SAP 12 SP3, SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2 +4 more 9.20.1-7.3.1

suse advisories SUSE-SU-2018:0464-1

  • p7zip openSUSE Tumbleweed 16.02-11.3

opensuse advisories openSUSE-SU-2024:11137-1

  • p7zip Alpine 3.17, Alpine 3.16, Alpine 3.15 +10 more 16.02-r2

alpine advisories ALPINE-CVE-2017-17969

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

  • p7zip Azure Linux 3.0 16.02-23
  • p7zip CBL-Mariner 2.0 16.02-22

azure linux advisories AZL-35092AZL-6783

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

Is CVE-2017-17969 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.

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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-2017-17969 updated cvss 9.1

p7zip: heap-based buffer overflow in 7zip/Compress/ShrinkDecoder.cpp can allow an attacker to write arbitrary data and cause a crash

  • Red Hat Enterprise Linux 8 p7zip
    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

4.99% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • landave.io https://landave.io/2018/01/7-zip-multiple-memory-corruptions-via-rar-and-zip/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

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.