Vulnerability Details : 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.
Products affected by CVE-2023-34095
- cpe:2.3:a:openprinting:cpdb-libs:*:*:*:*:*:*:*:*
- cpe:2.3:a:openprinting:cpdb-libs:2.0:beta2:*:*:*:*:*:*
- cpe:2.3:a:openprinting:cpdb-libs:2.0:beta3:*:*:*:*:*:*
- cpe:2.3:a:openprinting:cpdb-libs:2.0:beta4:*:*:*:*:*:*
- cpe:2.3:a:openprinting:cpdb-libs:2.0:beta1:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-34095
0.64%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 79 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-34095
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST | |
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
GitHub, Inc. |
CWE ids for CVE-2023-34095
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A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).Assigned by: security-advisories@github.com (Primary)
References for CVE-2023-34095
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https://github.com/OpenPrinting/cpdb-libs/blob/85555fba64d34f53a2fce099b0488904cc48ed35/cpdb/cpdb-frontend.c#L372
cpdb-libs/cpdb/cpdb-frontend.c at 85555fba64d34f53a2fce099b0488904cc48ed35 · OpenPrinting/cpdb-libs · GitHubProduct
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https://github.com/OpenPrinting/cpdb-libs/commit/f181bd1f14757c2ae0f17cc76dc20421a40f30b7
Merge pull request from GHSA-25j7-9gfc-f46x · OpenPrinting/cpdb-libs@f181bd1 · GitHubPatch
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https://github.com/OpenPrinting/cpdb-libs/security/advisories/GHSA-25j7-9gfc-f46x
buffer overflows via scanf · Advisory · OpenPrinting/cpdb-libs · GitHubExploit;Vendor Advisory
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http://www.openwall.com/lists/oss-security/2023/06/14/7
oss-security - CVE-2023-34095: cpdb-libs: Buffer overflows via scanfExploit;Mailing List;Third Party Advisory
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https://github.com/OpenPrinting/cpdb-libs/blob/85555fba64d34f53a2fce099b0488904cc48ed35/tools/cpdb-text-frontend.c#L453
cpdb-libs/tools/cpdb-text-frontend.c at 85555fba64d34f53a2fce099b0488904cc48ed35 · OpenPrinting/cpdb-libs · GitHubProduct
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https://github.com/OpenPrinting/cpdb-libs/blob/85555fba64d34f53a2fce099b0488904cc48ed35/tools/cpdb-text-frontend.c#L362
cpdb-libs/tools/cpdb-text-frontend.c at 85555fba64d34f53a2fce099b0488904cc48ed35 · OpenPrinting/cpdb-libs · GitHubProduct
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