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Public proof of conceptFix available

CVE-2023-34095

A public proof of concept exists; no exploitation attested.

  • Published2023-06-14
  • Fixed in2.0
  • WeaknessCWE-121 · CWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

cpdb-libs provides frontend and backend libraries for the Common Printing Dialog Backends (CPDB) project. In versions 1.0 through 2.0b4, cpdb-libs is vulnerable to buffer overflows via improper use of `scanf(3)`. cpdb-libs uses the `fscanf()` and `scanf()` functions to parse command lines and configuration files, dropping the read string components into fixed-length buffers, but does not limit the length of the strings to be read by `fscanf()` and `scanf()` causing buffer overflows when a string is longer than 1023 characters. A patch for this issue is available at commit f181bd1f14757c2ae0f17cc76dc20421a40f30b7. As all buffers have a length of 1024 characters, the patch limits the maximum string length to be read to 1023 by replacing all occurrences of `%s` with `%1023s` in all calls of the `fscanf()` and `scanf()` functions.

Timeline

dates in UTC
  1. 2023-06-1417:15CVE publishedNVD

Versions per branch

NVD
Openprinting cpdb-libs
BranchAffectedFixed in
2.0≥ 1.0, < 2.02.0
2.0= 2.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • OpenPrinting cpdb-libs
    Affected
    • = >= 1.0, <= 2.0b4no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2023-06-14

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • cpdb-libsUbuntu:22.04:LTSall versions · fixed in 1.2.0-0ubuntu8.1.22.04.1
  • cpdb-libsUbuntu:20.04:LTSall versions · fixed in 1.2.0-0ubuntu7.1
  • cpdb-libsUbuntu:18.04:LTSall versions · no fixed version listed
  • cpdb-libsDebian:14all versions · fixed in 1.2.0-3
  • cpdb-libsDebian:13all versions · fixed in 1.2.0-3
  • cpdb-libsDebian:12all versions · fixed in 1.2.0-2+deb12u1

Full record on NVD

Fix

  1. Update Openprinting cpdb-libs to 2.0

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionpoc2024-12-30
  • CNACVSS 3.19.8known since 2026-10-23
  • NVDCVSS 3.19.8read 2026-10-23
  • CNAweakness (CWE)CWE-121known since 2026-10-23
  • NVDweakness (CWE)CWE-787read 2026-10-23
  • FIRST EPSSEPSS score1.5 %2026-11-08
  • OSVaffected packages—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2023-06-14
Last Modified
2026-06-17
NVD status
Analyzed

Frequently asked questions

What is CVE-2023-34095?

cpdb-libs provides frontend and backend libraries for the Common Printing Dialog Backends (CPDB) project. In versions 1.0 through 2.0b4, cpdb-libs is vulnerable to buffer overflows via improper use of `scanf(3)`. cpdb-libs uses the `fscanf()` and `scanf()` functions to parse command lines and configuration files, dropping the read string components into fixed-length buffers, but does not limit the length of the strings to be read by `fscanf()` and `scanf()` causing buffer overflows when a string is longer than 1023 characters. A patch for this issue is available at commit f181bd1f14757c2ae0f17cc76dc20421a40f30b7. As all buffers have a length of 1024 characters, the patch limits the maximum string length to be read to 1023 by replacing all occurrences of `%s` with `%1023s` in all calls of the `fscanf()` and `scanf()` functions.

Is CVE-2023-34095 actively exploited?

A proof-of-concept exploit exists for CVE-2023-34095, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2023-34095?

CVE-2023-34095 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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