ALT-PU-2026-6633-1

Обновление пакета libcupsfilters в ветке sisyphus

Версия2.1.1-alt2

Задание#415978

Опубликовано2026-04-22

Макс. серьёзностьMEDIUM

Серьёзность:

Закрытые проблемы (4)

LOW3.7

Уязвимость функции cfFilterImageToRaster сервера печати CUPS, позволяющая нарушителю оказать воздействие на конфиденциальность и целостность защищаемой информации

Опубликовано: 2025-12-16Изменено: 2026-05-06

CVSS 3.xНИЗКАЯ 3.7

CVSS:3.x/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS 2.0НИЗКАЯ 2.9

CVSS:2.0/AV:A/AC:H/Au:S/C:P/I:P/A:N

Ссылки

CVE-2025-57812

MEDIUM4.0

Уязвимость пакета для печати CUPS Filters и библиотеки для сервера печати Libcupsfilters, позволяющая нарушителю вызвать отказ в обслуживании

Опубликовано: 2026-03-16Изменено: 2026-05-06

CVSS 3.xСРЕДНЯЯ 4.0

CVSS:3.x/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS 2.0НИЗКАЯ 2.1

CVSS:2.0/AV:L/AC:L/Au:N/C:N/I:N/A:P

Ссылки

CVE-2025-64503

LOW3.7

CUPS is a standards-based, open-source printing system, and `libcupsfilters` contains the code of the filters of the former `cups-filters` package as library functions to be used for the data format conversion tasks needed in Printer Applications. In CUPS-Filters versions up to and including 1.28.17 and libscupsfilters versions 2.0.0 through 2.1.1, CUPS-Filters's `imagetoraster` filter has an out of bounds read/write vulnerability in the processing of TIFF image files. While the pixel buffer is allocated with the number of pixels times a pre-calculated bytes-per-pixel value, the function which processes these pixels is called with a size of the number of pixels times 3. When suitable inputs are passed, the bytes-per-pixel value can be set to 1 and bytes outside of the buffer bounds get processed. In order to trigger the bug, an attacker must issue a print job with a crafted TIFF file, and pass appropriate print job options to control the bytes-per-pixel value of the output format. They must choose a printer configuration under which the `imagetoraster` filter or its C-function equivalent `cfFilterImageToRaster()` gets invoked. The vulnerability exists in both CUPS-Filters 1.x and the successor library libcupsfilters (CUPS-Filters 2.x). In CUPS-Filters 2.x, the vulnerable function is `_cfImageReadTIFF() in libcupsfilters`. When this function is invoked as part of `cfFilterImageToRaster()`, the caller passes a look-up-table during whose processing the out of bounds memory access happens. In CUPS-Filters 1.x, the equivalent functions are all found in the cups-filters repository, which is not split into subprojects yet, and the vulnerable code is in `_cupsImageReadTIFF()`, which is called through `cupsImageOpen()` from the `imagetoraster` tool. A patch is available in commit b69dfacec7f176281782e2f7ac44f04bf9633cfa.

Опубликовано: 2025-11-12Изменено: 2026-01-20

CVSS 3.xНИЗКАЯ 3.7

CVSS:3.x/CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Ссылки

LOW3.3

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.

Опубликовано: 2025-11-12Изменено: 2026-01-20

CVSS 3.xНИЗКАЯ 3.3

CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Ссылки