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CVE-2018-1000035

40
FAUCET Score

CVE-2018-1000035 is a high-severity heap-based buffer overflow vulnerability affecting Info-Zip UnZip versions 6.00 and earlier. This flaw allows an attacker to trigger a denial of service or potentially execute arbitrary code by tricking a user into opening a specially crafted password-protected archive. With a CVSS score of 7.8, the vulnerability has a high impact on confidentiality, integrity, and availability, requiring user interaction but with low attack complexity. Despite its high risk score and potential for code execution, there is currently no public exploit code available, nor is it listed on CISA's KEV catalog, and it has received no community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.00CPE matchmatch criteria
cpe:2.3:a:unzip_project:unzip:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
29.97%
Probability of exploitation in next 30 days
EPSS Percentile
98.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.2997 is in the 98th percentile among its peer group of 11,617 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (36)

microsoftpatch availablevia msrc
Product: unzip-6.0-20.azl3.aarch64.rpm on Azure Linux 3.0 ARMFixed in: 6.0-20
microsoftpatch availablevia msrc
Product: 18861-17084Fixed in: 6.0-20
microsoftpatch availablevia msrc
Product: 16846-16817Fixed in: 6.0-20
microsoftpatch availablevia msrc
Product: 16921-16820Fixed in: 6.0-16
microsoftpatch availablevia msrc
Product: 16845-16823Fixed in: 6.0-19
microsoftpatch availablevia msrc
Product: azl3 unzip 6.0-20 on Azure Linux 3.0Fixed in: 6.0-20
microsoftpatch availablevia msrc
Product: azl3 unzip 6.0-22 on Azure Linux 3.0Fixed in: 6.0-20
microsoftpatch availablevia msrc
Product: cm1 unzip 6.0-16 on CBL Mariner 1.0Fixed in: 6.0-16
microsoftpatch availablevia msrc
Product: cbl2 unzip 6.0-19 on CBL Mariner 2.0Fixed in: 6.0-19
microsoftpatch availablevia msrc
Product: unzip-debuginfo-6.0-19.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 6.0-19
microsoftpatch availablevia msrc
Product: unzip-6.0-20.azl3.x86_64.rpm on Azure Linux 3.0 x64Fixed in: 6.0-20
microsoftpatch availablevia msrc
Product: 16846-17084Fixed in: 6.0-20
microsoftpatch availablevia msrc
Product: 12847-12137Fixed in: 6.0-16
microsoftpatch availablevia msrc
Product: 12848-12137Fixed in: 6.0-16
microsoftpatch availablevia msrc
Product: 12849-12138Fixed in: 6.0-16
microsoftpatch availablevia msrc
Product: 12850-12138Fixed in: 6.0-16
microsoftpatch availablevia msrc
Product: 12841-12139Fixed in: 6.0-19
microsoftpatch availablevia msrc
Product: 12842-12139Fixed in: 6.0-19
microsoftpatch availablevia msrc
Product: 12843-12140Fixed in: 6.0-19
microsoftpatch availablevia msrc
Product: 12844-12140Fixed in: 6.0-19
microsoftpatch availablevia msrc
Product: 12845-12356Fixed in: 6.0-20
microsoftpatch availablevia msrc
Product: 12846-12357Fixed in: 6.0-20
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 x64Fixed in: 6.0-16
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 ARMFixed in: 6.0-16
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 6.0-19
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 6.0-19
microsoftpatch availablevia msrc
Product: unzip-6.0-16.cm1.x86_64.rpm on CBL Mariner 1.0 x64Fixed in: 6.0-16
microsoftpatch availablevia msrc
Product: unzip-debuginfo-6.0-16.cm1.x86_64.rpm on CBL Mariner 1.0 x64Fixed in: 6.0-16
microsoftpatch availablevia msrc
Product: unzip-6.0-16.cm1.aarch64.rpm on CBL Mariner 1.0 ARMFixed in: 6.0-16
microsoftpatch availablevia msrc
Product: unzip-debuginfo-6.0-16.cm1.aarch64.rpm on CBL Mariner 1.0 ARMFixed in: 6.0-16
microsoftpatch availablevia msrc
Product: unzip-6.0-19.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 6.0-19
microsoftpatch availablevia msrc
Product: unzip-debuginfo-6.0-19.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 6.0-19
microsoftpatch availablevia msrc
Product: unzip-6.0-19.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 6.0-19
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: unzip
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: unzip
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: unzip

Vendor Advisories (4)

microsoft2024-Jun/CVE-2018-1000035

CVE-2018-1000035

Jun 11, 2024
microsoft2020-Aug/CVE-2018-1000035

CVE-2018-1000035

Aug 11, 2020
microsoft2018-FEB/CVE-2018-1000035Important

A heap-based buffer overflow exists in Info-Zip UnZip version <= 6.00 in the processing of password-protected archives that allows an attacker to perform a denial of service or to possibly achieve code execution.

Feb 13, 2018
redhatCVE-2018-1000035Low

unzip: Heap-based buffer overflow in fileio.c:UzpPassword function allows code execution

Feb 7, 2018

References

lists.debian.org / debian-lts-announce/2020/01/msg00026.html
sec-consult.com / en/blog/advisories/multiple-vulnerabilities-in-infozip-unzip/index.html
Third Party Advisory
security.gentoo.org / glsa/202003-58