CVE-2015-1200: Race condition in pxz 4.999.99 Beta 3 uses weak file permissions for the output file when compressing a file b

Routine

LOW 2.1DOWNGRADE

CVE-2015-1200 is a low-severity flaw (CVSS 2.1) affecting pxz. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Race condition in pxz 4.999.99 Beta 3 uses weak file permissions for the output file when compressing a file before changing the permission to match the original file, which allows local users to bypass the intended access restrictions.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	2.1 (Low)
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-362
Published	2015-01-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pxz project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2015-01-23 15:59 UTCPublished CVE record published
2026-06-17 00:21 UTCUpdated Record last modified

pxz project pxz DOWNGRADE

Affected: 4.999.99 beta3

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.999.99

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.999.99 (Debian / Ubuntu)

apt-cache madison pxz sudo apt install pxz=<VERSION_BEFORE_4.999.99> sudo apt-mark hold pxz

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

dnf --showduplicates list pxz sudo dnf downgrade pxz-<VERSION_BEFORE_4.999.99> sudo dnf versionlock add pxz

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-2015-1200?

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

Is CVE-2015-1200 being exploited?

CVE-2015-1200 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-2015-1200 affect?

CVE-2015-1200 affects pxz. Severity is low (CVSS 2.1). Race condition in pxz 4.999.99 Beta 3 uses weak file permissions for the output file when compressing a file before changing the permission to match the original file, which allows local users to bypass the intended access restrictions.

How urgent is CVE-2015-1200?

Priority 12/100. No elevated risk signals yet.

References

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