[BIGSLEEP-434615384] cups-filters 1.x: out of bounds write in pdftoraster
Summary
| CVE | CVE-2025-64503 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-11-12 22:15:50 UTC |
| Updated | 2026-10-18 20:10:00 UTC |
| Description | cups-filters contains backends, filters, and other software required to get the cups printing service working on operating systems other than macos. In cups-filters prior to 1.28.18, by crafting a PDF file with a large `MediaBox` value, an attacker can cause CUPS-Filter 1.x’s `pdftoraster` tool to write beyond the bounds of an array. First, a PDF with a large `MediaBox` width value causes `header.cupsWidth` to become large. Next, the calculation of `bytesPerLine = (header.cupsBitsPerPixel * header.cupsWidth + 7) / 8` overflows, resulting in a small value. Then, `lineBuf` is allocated with the small `bytesPerLine` size. Finally, `convertLineChunked` calls `writePixel8`, which attempts to write to `lineBuf` outside of its buffer size (out of bounds write). In libcupsfilters, the maintainers found the same `bytesPerLine` multiplication without overflow check, but the provided test case does not cause an overflow there, because the values are different. Commit 50d94ca0f2fa6177613c97c59791bde568631865 contains a patch, which is incorporated into cups-filters version 1.28.18. |
Risk And Classification
Primary CVSS: v3.1 3.3 LOW from [email protected]
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
EPSS: 0.002280000 probability, percentile 0.126590000 (date 2026-10-18)
Problem Types: CWE-787 | CWE-787 CWE-787: Out-of-bounds Write
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 3.3 | LOW | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L |
| 3.1 | [email protected] | Secondary | 4 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| 3.1 | CNA | DECLARED | 4 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
NoneUser Interaction
RequiredScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Openprinting | Cups-filters | All | All | All | All |
| Application | Openprinting | Libcupsfilters | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | OpenPrinting | Cups-filters | affected cups-filters < 1.28.18 | Not specified |
| CNA | OpenPrinting | Cups-filters | affected libcupsfilters >= 2.0.0, < 2.1.2 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/OpenPrinting/cups-filters/blob/aea8d0db017e495b0204433ebdb0e8... | [email protected] | github.com | Product |
| github.com/OpenPrinting/cups-filters/commit/50d94ca0f2fa6177613c97c59791... | [email protected] | github.com | Patch |
| github.com/OpenPrinting/cups-filters/blob/aea8d0db017e495b0204433ebdb0e8... | [email protected] | github.com | Product |
| github.com/OpenPrinting/cups-filters/security/advisories/GHSA-893j-2wr2-... | [email protected] | github.com | Exploit, Vendor Advisory |
| github.com/OpenPrinting/libcupsfilters/blob/1dd86d835b27ed149b66aee1a485... | [email protected] | github.com | Product |
| www.openwall.com/lists/oss-security/2025/11/12/2 | af854a3a-2127-422b-91ae-364da2661108 | www.openwall.com | Mailing List, Third Party Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.