Описание
pypdf: Possible long runtimes/large memory usage when extracting XForm objects
Impact
An attacker who uses this vulnerability can craft a PDF which leads to long runtimes and large memory consumption. This requires extracting the text of a page with lots of XForm objects, where some of them might be re-used.
Patches
This has been fixed in pypdf==6.16.1.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #3966.
Пакеты
pypdf
< 6.16.1
6.16.1
Связанные уязвимости
(pypdf is a free and open-source pure-python PDF library. Prior to 6.16 ...)
pypdf is a free and open-source pure-python PDF library. Prior to 6.16.1, an attacker can craft a PDF that causes pypdf/_page.py PageObject._extract_text and PageObject.extract_xform_text to traverse a directed acyclic graph of reused form XObjects in which each form invokes a child multiple times, creating exponentially many traversal paths and causing long runtimes and large memory consumption. This issue is fixed in version 6.16.1.
pypdf is a free and open-source pure-python PDF library. Prior to 6.16.1, an attacker can craft a PDF that causes pypdf/_page.py PageObject._extract_text and PageObject.extract_xform_text to traverse a directed acyclic graph of reused form XObjects in which each form invokes a child multiple times, creating exponentially many traversal paths and causing long runtimes and large memory consumption. This issue is fixed in version 6.16.1.
pypdf is a free and open-source pure-python PDF library. Prior to 6.16 ...
Уязвимость функций PageObject._extract_text() и PageObject.extract_xform_text() библиотеки Python для работы с PDF файлами PyPDF, позволяющая нарушителю вызвать отказ в обслуживании