CVE-2023-34095
Published: 14 June 2023
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.
Notes
| Author | Note |
|---|---|
| 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 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
cpdb-libs Launchpad, Ubuntu, Debian |
bionic |
Needed
|
| focal |
Released
(1.2.0-0ubuntu7.1)
|
|
| jammy |
Released
(1.2.0-0ubuntu8.1.22.04.1)
|
|
| kinetic |
Released
(1.2.0-0ubuntu8.1.22.10.1)
|
|
| lunar |
Released
(2.0~b4-0ubuntu2.1)
|
|
| mantic |
Released
(2.0~b4-0ubuntu4)
|
|
| noble |
Released
(2.0~b4-0ubuntu4)
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
|
Patches: upstream: https://github.com/OpenPrinting/cpdb-libs/commit/f181bd1f1 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.8 |
| 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 |