CVE-2001-0463: Directory traversal vulnerability in cal_make.pl in PerlCal allows remote attackers to read arbitrary files vi

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MEDIUM 5.0DOWNGRADE

CVE-2001-0463 is a medium-severity flaw (CVSS 5.0) affecting perlcal. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Directory traversal vulnerability in cal_make.pl in PerlCal allows remote attackers to read arbitrary files via a .. (dot dot) in the p0 parameter.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	3.8% (top 10%)
CISA exploited list	No
Published	2001-06-27
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: acme labs

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

Am I affected?

Timeline

2001-06-27 04:00 UTCPublished CVE record published
2026-06-16 21:54 UTCUpdated Record last modified

acme labs perlcal DOWNGRADE

Affected: 2.3 · 2.4 · 2.5 · 2.6 · 2.7 · 2.9 · 2.9a · 2.9b

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3

1. Check installed version

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

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

apt-cache madison perlcal sudo apt install perlcal=<VERSION_BEFORE_2.3> sudo apt-mark hold perlcal

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

dnf --showduplicates list perlcal sudo dnf downgrade perlcal-<VERSION_BEFORE_2.3> sudo dnf versionlock add perlcal

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: PerlCal 2.x - Directory Traversal

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-2001-0463?

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

Is CVE-2001-0463 being exploited?

CVE-2001-0463 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-2001-0463 affect?

CVE-2001-0463 affects perlcal. Severity is medium (CVSS 5.0). Directory traversal vulnerability in cal_make.pl in PerlCal allows remote attackers to read arbitrary files via a .. (dot dot) in the p0 parameter.

How urgent is CVE-2001-0463?

Priority 45/100. Public exploit reference

Related CVEs

CVE-2005-4162 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in cal_make.pl in ACME PerlCal 2.99.20 allows remote attackers to inj

References

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