Description
Info-ZIP UnZip 6.0 allows remote attackers to cause a denial of service (infinite loop) via empty bzip2 data in a ZIP archive.
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 | 6.0-19 | — |
| Debian 13 | unzip | 6.0-19 | — |
| Debian 12 | unzip | 6.0-19 | — |
| Debian 8 | unzip | 6.0-16+deb8u1 | DSA-3386-1 |
| Debian 7 | unzip | 6.0-8+deb7u4 | DSA-3386-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 6.0 | unzip | 6.0-4+deb6u3 | DLA-330-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | unzip | 6.0-9ubuntu1.4 | USN-2788-1 |
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 | 6.00-31.1 | openSUSE-SU-2024:10480-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | unzip | 6.0-r1 | — |
| Alpine v3.23 | unzip | 6.0-r1 | — |
| Alpine v3.22 | unzip | 6.0-r1 | — |
| Alpine v3.21 | unzip | 6.0-r1 | — |
| Alpine v3.20 | unzip | 6.0-r1 | — |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | unzip | 6.0-r1 | — |
| Alpine v3.18 | unzip | 6.0-r1 | — |
| Alpine v3.17 | unzip | 6.0-r1 | — |
| Alpine v3.16 | unzip | 6.0-r1 | — |
| Alpine v3.15 | unzip | 6.0-r1 | — |
| Alpine v3.14 | unzip | 6.0-r1 | — |
| Alpine v3.13 | unzip | 6.0-r1 | — |
| Alpine v3.12 | unzip | 6.0-r1 | — |
| Alpine v3.11 | unzip | 6.0-r1 | — |
| Alpine v3.10 | unzip | 6.0-r1 | — |
| Alpine v3.9 | unzip | 6.0-r1 | — |
| Alpine v3.8 | unzip | 6.0-r1 | — |
| Alpine v3.7 | unzip | 6.0-r1 | — |
| Alpine v3.6 | unzip | 6.0-r1 | — |
| Alpine v3.5 | unzip | 6.0-r1 | — |
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 8
- DLA-330-1 unzip - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3386-1 unzip - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-2788-1 unzip vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2018:2978-1 Security update for unzip SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10480-1 unzip-6.00-31.1 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
- USN-2788-2 vendor-advisory
- [oss-security] 20150907 Heap overflow and DoS in unzip 6.0 mailing-list
- DSA-3386 vendor-advisory
- 1034027 vdb-entry
- USN-2788-1 vendor-advisory
- http://sourceforge.net/p/infozip/patches/23/
- [oss-security] 20150915 Re: Heap overflow and DoS in unzip 6.0 mailing-list
- 76863 vdb-entry
- [oss-security] 20151011 Re: Heap overflow and DoS in unzip 6.0 mailing-list