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CVE-2000-1221· NVD / CVE Program· CNA mitre

The line printer daemon (lpd) in the lpr package in multiple Linux operating systems authenticates by comparing the reverse-resolved hostnam

The line printer daemon (lpd) in the lpr package in multiple Linux operating systems authenticates by comparing the reverse-resolved hostname of the local machine to the hostname of the print server as returned by gethostname, which allows remote attackers to bypass intended access controls by modifying the DNS for the attacking IP.

CriticalCVSS 10.0 · v2.0—Proof of concept Fix available
Published
Jan 8, 2000
Updated
Jun 16, 2026
EPSS
16.7% · 97th percentile
CWE
—
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Report tools

JSON

Action score

45

Plan

Add it to your regular patch cycle.

CVSS
40 / 40 · 10.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
5 / 30 · 16.7%

Affected systems

VendorProduct
sgiirix
debiandebian linux
redhatlinux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux2.1
  • redhat linux4.1
  • redhat linux4.2
  • redhat linux5.0
  • redhat linux5.2
  • redhat linux6.0
  • redhat linux6.1
  • sgi irix6.5
  • sgi irix6.5.1
  • sgi irix6.5.10
  • sgi irix6.5.11
  • sgi irix6.5.12
  • sgi irix6.5.13
  • sgi irix6.5.14f
  • sgi irix6.5.14m
  • sgi irix6.5.15f
  • sgi irix6.5.15m
  • sgi irix6.5.16f
  • sgi irix6.5.16m
  • sgi irix6.5.17f

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12lprbefore 1:0.48-11:0.48-1

Same product

sgi: all records

Other highest-scoring records for the same primary product.

  • CVE-2001-0797Buffer overflow in login in various System V based operating systems allows remote attackers to execute arbitrary commands via a large numbe
    68This week
  • CVE-2001-0800lpsched in IRIX 6.5.13f and earlier allows remote attackers to execute arbitrary commands via shell metacharacters.
    56Plan
  • CVE-2000-0733Telnetd telnet server in IRIX 5.2 through 6.1 does not properly cleans user-injected format strings, which allows remote attackers to execut
    44Plan
  • CVE-2000-0245Vulnerability in SGI IRIX objectserver daemon allows remote attackers to create user accounts.
    44Plan
  • CVE-2000-1220The line printer daemon (lpd) in the lpr package in multiple Linux operating systems allows local users to gain root privileges by causing s
    44Plan
  • CVE-1999-0208rpc.ypupdated (NIS) allows remote users to execute arbitrary commands.
    44Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:lpr1:0.48-1 · Debian:12Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Exploit-DB entry ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entryremote2000-01-11

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.

  1. Published
  2. First PoC+3 d
  3. TodaySep 30, 2026+9762 d
EPSS, last 120 days

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 researchers

Finders, 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

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
C · data can be read
Integrity
C · data or configuration can be modified
Availability
C · the service can be disrupted
Attack complexity
Low
Confidentiality impact
C
Integrity impact
C
Availability impact
C

Weakness class (CWE)

—

CVSS vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

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 help

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records