Description
pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for malformed startxref. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for invalid startxref entries. When rebuilding the cross-reference table, PDF files with lots of whitespace characters become problematic. Only the non-strict reading mode is affected. Only the non-strict reading mode is affected. This issue has been patched in version 6.6.0.
Problem types
CWE-1333: Inefficient Regular Expression Complexity
CWE-400: Uncontrolled Resource Consumption
Product status
References
github.com/.../pypdf/security/advisories/GHSA-4f6g-68pf-7vhv
github.com/py-pdf/pypdf/pull/3594
github.com/...ommit/294165726b646bb7799be1cc787f593f2fdbcf45
github.com/py-pdf/pypdf/releases/tag/6.6.0