Race condition in Unzip 5.52 allows local users to modify permissions of arbitrary files via a hard link attack on a file while it is being
Race condition in Unzip 5.52 allows local users to modify permissions of arbitrary files via a hard link attack on a file while it is being decompressed, whose permissions are changed by Unzip after the decompression is complete.
- Published
- Aug 5, 2005
- Updated
- Jun 16, 2026
- EPSS
- 0.4% · 32th percentile
- CWE
- —
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Report tools
Action score
4
Monitor
Low priority for now.
- CVSS
- 4 / 40 · 1.2 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.4%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| info-zip | unzip | cpe:2.3:a:info-zip:unzip |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- info-zip unzip5.52
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | unzip | before 5.52-4 | 5.52-4 |
| Debian:3.0 | unzip | before 5.50-1woody5 | 5.50-1woody5 |
| Debian:3.1 | unzip | before 5.52-1sarge3 | 5.52-1sarge3 |
| openSUSE:Tumbleweed | unzip | before 6.00-39.1 | 6.00-39.1 |
| Red Hat:enterprise_linux:3::as | unzip | before 0:5.50-35.EL3 | 0:5.50-35.EL3 |
| Red Hat:enterprise_linux:3::as | unzip-debuginfo | before 0:5.50-35.EL3 | 0:5.50-35.EL3 |
| Red Hat:enterprise_linux:4::as | unzip | before 0:5.51-9.EL4.5 | 0:5.51-9.EL4.5 |
| Red Hat:enterprise_linux:4::as | unzip-debuginfo | before 0:5.51-9.EL4.5 | 0:5.51-9.EL4.5 |
Same product
info-zip: all recordsOther highest-scoring records for the same primary product.
- CVE-2018-1000033An 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 mem37Monitor
- CVE-2018-1000034An 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 mem36Monitor
- CVE-2018-1000032A heap-based buffer overflow exists in Info-Zip UnZip version 6.10c22 that allows an attacker to perform a denial of service or to possibly 31Monitor
- CVE-2018-1000031A heap-based buffer overflow exists in Info-Zip UnZip version 6.10c22 that allows an attacker to perform a denial of service or to possibly 31Monitor
- CVE-2015-1315Buffer overflow in the charset_to_intern function in unix/unix.c in Info-Zip UnZip 6.10b allows remote attackers to execute arbitrary code v31Monitor
- CVE-2005-0602Unzip 5.51 and earlier does not properly warn the user when extracting setuid or setgid files, which may allow local users to gain privilege24Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:unzip | 5.52-4 · Debian:12 | Package registry (OSV) |
| opensuse:unzip | 6.00-39.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:unzip | 0:5.50-35.EL3 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:unzip-debuginfo | 0:5.50-35.EL3 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- P · data can be read
- Integrity
- none
- Availability
- none
- Attack complexity
- High
- Confidentiality impact
- P
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
—
CVSS vector
AV:L/AC:H/Au:N/C:P/I:N/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2005.39/SCOSA-2005.39.txt
- marc.info/?l=bugtraq&m=112300046224117&w=2
- secunia.com/advisories/16309
- secunia.com/advisories/16985
- secunia.com/advisories/17006
- secunia.com/advisories/17045
- secunia.com/advisories/17342
- secunia.com/advisories/17653
- secunia.com/advisories/25098
- securityreason.com/securityalert/32
- www.debian.org/security/2005/dsa-903
- www.info-zip.org/FAQ.html
- www.mandriva.com/security/advisories?name=MDKSA-2005:197
- www.osvdb.org/18530
- www.redhat.com/support/errata/RHSA-2007-0203.html
- www.securityfocus.com/bid/14450
- www.trustix.org/errata/2005/0053/
- www.ubuntu.com/usn/usn-191-1
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9975
Vendor advisories and official records. Exploit/PoC links are deliberately left out.