CVE-2006-0950: unalz 0.53 allows user-assisted attackers to overwrite arbitrary files via an ALZ archive with ".." (dot dot)

Routine

LOW 2.6DOWNGRADE

CVE-2006-0950 is a low-severity flaw (CVSS 2.6) affecting unalz. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

unalz 0.53 allows user-assisted attackers to overwrite arbitrary files via an ALZ archive with ".." (dot dot) sequences in a filename.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	2.6 (Low)
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-22
Published	2006-03-13
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: unalz

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2006-03-13 19:34 UTCPublished CVE record published
2026-06-16 22:21 UTCUpdated Record last modified

unalz unalz DOWNGRADE

Affected: 0.53

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.53

1. Check installed version

apt-cache policy unalz || rpm -q unalz || unalz --version

2. No fixed release: DOWNGRADE to a release before 0.53 (Debian / Ubuntu)

apt-cache madison unalz sudo apt install unalz=<VERSION_BEFORE_0.53> sudo apt-mark hold unalz

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list unalz sudo dnf downgrade unalz-<VERSION_BEFORE_0.53> sudo dnf versionlock add unalz

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2006-0950?

unalz: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-0950 being exploited?

CVE-2006-0950 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2006-0950 affect?

CVE-2006-0950 affects unalz. Severity is low (CVSS 2.6). unalz 0.53 allows user-assisted attackers to overwrite arbitrary files via an ALZ archive with ".." (dot dot) sequences in a filename.

How urgent is CVE-2006-0950?

Priority 28/100. No elevated risk signals yet.

Related CVEs

CVE-2005-3862 HIGH 7.5 DOWNGRADE Buffer overflow in unalz before 0.53 allows remote attackers to execute arbitrary code via long file names in

References

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