Description
The NEEDBITS macro in the inflate_dynamic function in inflate.c for unzip can be invoked using invalid buffers, which allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unknown vectors that trigger a free of uninitialized or previously-freed data.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| info-zip | unzip | < 6.0 | 6.0 |
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 | 5.52-11 | — |
| Debian 13 | unzip | 5.52-11 | — |
| Debian 12 | unzip | 5.52-11 | — |
| Debian 4.0 | unzip | 5.52-9etch1 | DSA-1522-1 |
| Debian 3.1 | unzip | 5.52-1sarge5 | DSA-1522-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 3 | unzip | 5.50-36.EL3 | RHSA-2008:0196 |
| RHEL 2 | unzip | 5.50-31.EL2.1 | RHSA-2008:0196 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | unzip | 6.0-20 | — |
| Azure Linux 2 (CBL-Mariner) | unzip | 6.0-19 | — |
Advisories 2
- RHSA-2008:0196 Red Hat Security Advisory: unzip security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1522-1 unzip - potential code execution Debian Security (DSA / DLA) · Mar 9, 2026
References
- 29415 third-party-advisory
- 20080321 rPSA-2008-0116-1 unzip mailing-list
- 29427 third-party-advisory
- ADV-2008-1744 vdb-entry
- 29440 third-party-advisory
- DSA-1522 vendor-advisory
- 29432 third-party-advisory
- https://issues.rpath.com/browse/RPL-2317
- http://wiki.rpath.com/Advisories:rPSA-2008-0116
- http://www.vmware.com/security/advisories/VMSA-2008-0009.html
- APPLE-SA-2010-03-29-1 vendor-advisory
- 29392 third-party-advisory
- 29681 third-party-advisory
- MDVSA-2008:068 vendor-advisory
- SUSE-SR:2008:007 vendor-advisory
- ADV-2008-0913 vdb-entry
- 30535 third-party-advisory
- http://www.ipcop.org/index.php?name=News&file=article&sid=40
- http://support.apple.com/kb/HT4077
- 20080604 VMSA-2008-0009 Updates to VMware Workstation, VMware Player, VMware ACE, VMware Fusion, VMware Server, VMware VIX API, VMware ESX, VMware ESXi resolve critical security issues mailing-list
- GLSA-200804-06 vendor-advisory
- oval:org.mitre.oval:def:9733 vdb-entry signature
- 29406 third-party-advisory
- 29495 third-party-advisory
- 31204 third-party-advisory
- 1019634 vdb-entry
- RHSA-2008:0196 vendor-advisory
- unzip-inflatedynamic-code-execution(41246) vdb-entry
- USN-589-1 vendor-advisory
- 28288 vdb-entry
- http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0116