unzip: Heap-based out-of-bounds access in extract.c:ef_scan_for_stream() possibly causing crash
Published Feb 9, 2018
9.1
CRITICALCVSS 3.0
EPSS 1.73%
Description
An out-of-bounds read exists in Info-Zip UnZip version 6.10c22 that allows an attacker to perform a denial of service and read sensitive memory.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
unzip
Not affected
Red Hat Enterprise Linux 6
unzip
Not affected
Red Hat Enterprise Linux 7
unzip
Not affected
Red Hat Enterprise Linux 8
unzip
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | unzip | Not affected | n/a |
| Red Hat Enterprise Linux 6 | unzip | Not affected | n/a |
| Red Hat Enterprise Linux 7 | unzip | Not affected | n/a |
| Red Hat Enterprise Linux 8 | unzip | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of unzip as shipped with Red Hat Enterprise Linux 5, 6, and 7, as they did not include support for ef_scan_for_stream function.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
AV:N/AC:L/Au:N/C:P/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.73% (0.01733) | 76.80th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.83% (0.01831) | 76.02th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.15% (0.00151) | 51.81th | v3 (v2023.03.01) |
| Nov 25, 2023 | 0.15% (0.00151) | 51.25th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.18% (0.00180) | 54.57th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.26% (0.00258) | 61.79th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.78% (0.00777) | 21.50th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.78% (0.00777) | 0.00th | v1 |
References (7)
- http://www.securityfocus.com/bid/103031 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2018-1000033 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1537062 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2018-1000033
- https://sec-consult.com/en/blog/advisories/multiple-vulnerabilities-in-infozip-unzip/index.html x_refsource_MISCThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-1000033
- https://www.sec-consult.com/en/blog/advisories/multiple-vulnerabilities-in-infozip-unzip/index.html
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/103031 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2018-1000033 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1537062 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-1000033 | ||
| https://sec-consult.com/en/blog/advisories/multiple-vulnerabilities-in-infozip-unzip/index.html | x_refsource_MISCThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2018-1000033 | ||
| https://www.sec-consult.com/en/blog/advisories/multiple-vulnerabilities-in-infozip-unzip/index.html |
Change history (0)
No recorded changes yet.