CVE-2001-0142: squid 2.3 and earlier allows local users to overwrite arbitrary files via a symlink attack in some configurati

Routine

LOW 1.2WATCHLISTDOWNGRADEDOWNGRADEMITIGATE

CVE-2001-0142 is a low-severity flaw (CVSS 1.2) affecting immunix, squid web proxy, mandrake linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

squid 2.3 and earlier allows local users to overwrite arbitrary files via a symlink attack in some configurations.

Why this priority

On your watchlist

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

Risk facts

CVSS score	1.2 (Low)
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Published	2001-03-12
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: immunix · mandrakesoft · national science foundation · redhat · trustix

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

Am I affected?

Timeline

2001-03-12 05:00 UTCPublished CVE record published
2026-06-16 21:53 UTCUpdated Record last modified

immunix immunix DOWNGRADE

Affected: 7.0_beta

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0_beta

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 7.0_beta (Debian / Ubuntu)

apt-cache madison immunix sudo apt install immunix=<VERSION_BEFORE_7.0_beta> sudo apt-mark hold immunix

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

dnf --showduplicates list immunix sudo dnf downgrade immunix-<VERSION_BEFORE_7.0_beta> sudo dnf versionlock add immunix

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.

national science foundation squid web proxy DOWNGRADE

Affected: 2.3_stable4

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3_stable4

1. Check installed version

apt-cache policy squid-web-proxy || rpm -q squid-web-proxy || squid-web-proxy --version

2. No fixed release: DOWNGRADE to a release before 2.3_stable4 (Debian / Ubuntu)

apt-cache madison squid-web-proxy sudo apt install squid-web-proxy=<VERSION_BEFORE_2.3_stable4> sudo apt-mark hold squid-web-proxy

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

dnf --showduplicates list squid-web-proxy sudo dnf downgrade squid-web-proxy-<VERSION_BEFORE_2.3_stable4> sudo dnf versionlock add squid-web-proxy

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.

mandrakesoft mandrake linux MITIGATE

Affected: 6.0 · 6.1 · 7.0 · 7.1 · 7.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat linux MITIGATE

Affected: 7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

trustix secure linux MITIGATE

Affected: 1.1 · 1.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2001-0142?

immunix: downgrade or apply the listed mitigation; squid web proxy: downgrade or apply the listed mitigation; mandrake linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2001-0142 being exploited?

CVE-2001-0142 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-2001-0142 affect?

CVE-2001-0142 affects immunix, squid web proxy, mandrake linux. Severity is low (CVSS 1.2). squid 2.3 and earlier allows local users to overwrite arbitrary files via a symlink attack in some configurations.

How urgent is CVE-2001-0142?

Priority 15/100. On your watchlist

Software pages

Squid vulnerabilities

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References

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