CVE-2023-34095
CriticalCVSS 9.8Exploitation Probability (EPSS)
Elevated risk72th percentile - higher than 72% of all known CVEs
Summary
The cpdb-libs libraries, used in the Common Printing Dialog Backends project, are vulnerable to buffer overflows in versions 1.0 through 2.0b4 due to improper use of `scanf(3)`. The issue arises because the length of read strings is not limited, leading to buffer overflows when a string exceeds 1023 characters.
Risk Assessment
Buffer overflows can lead to unauthorized memory access, posing a risk of executing malicious code and potentially serious security breaches in the system.
Recommendation
It is recommended to update cpdb-libs to a version that includes a patch limiting the maximum length of read strings to 1023 characters to prevent buffer overflows.
Original NVD description (English source)
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.