SB2026052127 - Multiple vulnerabilities in PyPDF

Description

This security bulletin contains information about 2 vulnerabilities.

1) Resource exhaustion (CVE-ID: N/A)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to cause excessive memory consumption.

The vulnerability exists due to uncontrolled resource consumption in the text extraction layout mode when processing a crafted PDF with large character offsets. A remote attacker can supply a specially crafted PDF to cause excessive memory consumption.

Exploitation requires text extraction to be performed in layout mode.

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

CWE-ID: CWE-834 - Excessive Iteration

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

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

The vulnerability exists due to excessive iteration in cross-reference stream processing when parsing a crafted PDF file. A remote attacker can supply a PDF with zero-only width values and a large size value to cause a denial of service.

Exploitation requires cross-reference streams with /W [0 0 0] values and large /Size values.

Remediation

Install update from vendor's website.

References

• https://github.com/py-pdf/pypdf/security/advisories/GHSA-cj93-chg6-vgv8
• https://github.com/py-pdf/pypdf/security/advisories
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-248m-82v9-q6g6
• https://github.com/py-pdf/pypdf/pull/3791