SB20260816533 - Multiple vulnerabilities in PyPDF

Description

This security bulletin contains information about 2 vulnerabilities.

1) Excessive Iteration (CVE-ID: N/A)

CWE-ID: CWE-834 - Excessive Iteration

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to excessive iteration in outline processing when retrieving document outlines from a crafted PDF with many entries or nested outlines with long re-used nesting paths. A remote attacker can supply a specially crafted PDF to cause a denial of service.

The issue is triggered when the application accesses the outlines of the document.

2) Excessive Iteration (CVE-ID: N/A)

CWE-ID: CWE-834 - Excessive Iteration

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to excessive iteration in XForm object extraction when extracting text from a page containing many XForm objects with reused objects. A remote attacker can craft a PDF file to cause a denial of service.

Exploitation requires the application to extract text from a page with many XForm objects, some of which are reused.

Remediation

Install update from vendor's website.

References

• https://github.com/py-pdf/pypdf/security/advisories/GHSA-23w6-3w8w-8484
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-763m-79hh-57f2