Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | unzip | 6.0-21 | — |
| Debian 13 | unzip | 6.0-21 | — |
| Debian 12 | unzip | 6.0-21 | — |
| Debian 7 | unzip | 6.0-8+deb7u6 | DLA-741-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | unzip | 6.0-21ubuntu1.1 | USN-4672-1 |
| Ubuntu 16.04 LTS | unzip | 6.0-20ubuntu1.1 | USN-4672-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | unzip | 6.0-9ubuntu1.6 | USN-4672-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | unzip | 6.00-33.8.1 | SUSE-SU-2018:2978-1 |
| SLES 11 SP4 | unzip | 6.00-11.17.1 | SUSE-SU-2017:0639-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | unzip | 6.00-33.8.1 | SUSE-SU-2018:2978-1 |
| SLES for SAP 11 SP4 | unzip | 6.00-11.17.1 | SUSE-SU-2017:0639-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | unzip | 6.00-39.1 | openSUSE-SU-2024:11485-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | unzip | 6.0-r3 | — |
| Alpine v3.23 | unzip | 6.0-r3 | — |
| Alpine v3.22 | unzip | 6.0-r3 | — |
| Alpine v3.21 | unzip | 6.0-r3 | — |
| Alpine v3.20 | unzip | 6.0-r3 | — |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | unzip | 6.0-r3 | — |
| Alpine v3.18 | unzip | 6.0-r3 | — |
| Alpine v3.17 | unzip | 6.0-r3 | — |
| Alpine v3.16 | unzip | 6.0-r3 | — |
| Alpine v3.15 | unzip | 6.0-r3 | — |
| Alpine v3.14 | unzip | 6.0-r3 | — |
| Alpine v3.13 | unzip | 6.0-r3 | — |
| Alpine v3.12 | unzip | 6.0-r3 | — |
| Alpine v3.11 | unzip | 6.0-r3 | — |
| Alpine v3.10 | unzip | 6.0-r3 | — |
| Alpine v3.9 | unzip | 6.0-r3 | — |
| Alpine v3.8 | unzip | 6.0-r3 | — |
| Alpine v3.7 | unzip | 6.0-r3 | — |
| Alpine v3.6 | unzip | 6.0-r3 | — |
| Alpine v3.5 | unzip | 6.0-r3 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | unzip | 6.0-43.amzn2 | ALAS2-2021-1604 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | unzip | 6.0-20 | — |
| Azure Linux 2 (CBL-Mariner) | unzip | 6.0-19 | — |
Advisories 7
- USN-4672-1 unzip vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- DLA-741-1 unzip - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2018:2978-1 Security update for unzip SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11485-1 unzip-6.00-39.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0639-1 Security update for unzip SUSE / openSUSE Security Updates · Feb 4, 2026
- VDE-2025-053 Phoenix Contact: Multiple Vulnerabilities in PLCnext Firmware CERT@VDE · Jul 8, 2025
- ALAS2-2021-1604 Important: unzip security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Feb 19, 2021
References
- 94728 vdb-entry
- https://bugs.launchpad.net/ubuntu/+source/unzip/+bug/1643750
- [oss-security] 20161205 CVE Request: Info-Zip zipinfo buffer overflow mailing-list
- [oss-security] 20161205 CVE Request: Info-Zip zipinfo buffer overflow mailing-list
- [oss-security] 20161205 Re: CVE Request: Info-Zip zipinfo buffer overflow mailing-list