| Name | CVE-2025-64503 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4380-1 |
| Debian Bugs | 1120697, 1120698 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| cups-filters (PTS) | bullseye | 1.28.7-1+deb11u2 | vulnerable |
| bullseye (security) | 1.28.7-1+deb11u4 | fixed | |
| bookworm, bookworm (security) | 1.28.17-3+deb12u1 | vulnerable | |
| trixie | 1.28.17-6 | vulnerable | |
| sid, forky | 1.28.17-7 | fixed | |
| libcupsfilters (PTS) | trixie | 2.0.0-3 | vulnerable |
| sid, forky | 2.1.1-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| cups-filters | source | bullseye | 1.28.7-1+deb11u4 | DLA-4380-1 | ||
| cups-filters | source | (unstable) | 1.28.17-7 | 1120698 | ||
| libcupsfilters | source | (unstable) | 2.1.1-2 | 1120697 |
[trixie] - libcupsfilters <no-dsa> (Minor issue)
[trixie] - cups-filters <no-dsa> (Minor issue)
[bookworm] - cups-filters <no-dsa> (Minor issue)
https://www.openwall.com/lists/oss-security/2025/11/12/2
https://github.com/OpenPrinting/cups-filters/security/advisories/GHSA-893j-2wr2-wrh9
Fixed by: https://github.com/OpenPrinting/cups-filters/commit/50d94ca0f2fa6177613c97c59791bde568631865
Fixed by: https://github.com/OpenPrinting/libcupsfilters/commit/fd01543f372ca3ba1f1c27bd3427110fa0094e3f