Buffer overflow in Openprinting Cpdb-Libs
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.015 (73.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
Affected products
- Openprinting Cpdb-Libs — versions >= 1.0, <= 2.0b4, 2.0
Weakness classification (CWE)
References
- github.com/OpenPrinting/cpdb-libs/security/advisories/GHSA-25j7-9gfc-f46x (Exploit, Vendor Advisory)
- github.com/OpenPrinting/cpdb-libs/commit/f181bd1f14757c2ae0f17cc76dc20421a40f30… (Patch)
- github.com/OpenPrinting/cpdb-libs/blob/85555fba64d34f53a2fce099b0488904cc48ed35… (Product)
- github.com/OpenPrinting/cpdb-libs/blob/85555fba64d34f53a2fce099b0488904cc48ed35… (Product)
- github.com/OpenPrinting/cpdb-libs/blob/85555fba64d34f53a2fce099b0488904cc48ed35… (Product)
- www.openwall.com/lists/oss-security/2023/06/14/7 (Exploit, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-34095?
- CVE-2023-34095 is a critical-severity vulnerability in Openprinting Cpdb-Libs, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2023-06-14.
- How severe is CVE-2023-34095?
- Critical severity. CVSS v3 base score is 9.8 out of 10.