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CVE-2023-34095

Publication date 14 June 2023

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
cpdb-libs 24.10 oracular
Fixed 2.0~b4-0ubuntu4
24.04 LTS noble
Fixed 2.0~b4-0ubuntu4
23.10 mantic
Fixed 2.0~b4-0ubuntu4
23.04 lunar
Fixed 2.0~b4-0ubuntu2.1
22.10 kinetic
Fixed 1.2.0-0ubuntu8.1.22.10.1
22.04 LTS jammy
Fixed 1.2.0-0ubuntu8.1.22.04.1
20.04 LTS focal
Fixed 1.2.0-0ubuntu7.1
18.04 LTS bionic
Vulnerable
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release

Notes

alexmurray

in B,F,J and K the affected code appears to be contained in lib/frontend_helper.c and demo/print_frontend.c respectively

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
cpdb-libs

Severity score breakdown

Parameter Value
Base score 9.8 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H