SB2026062315 - 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:L/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 uncontrolled resource consumption in cross-reference stream processing when parsing a crafted PDF with repeated malformed cross-reference entries. A remote attacker can supply a specially crafted PDF to cause a denial of service.

2) Uncontrolled Memory Allocation (CVE-ID: N/A)

CWE-ID: CWE-789 - Uncontrolled Memory Allocation

CVSSv4: 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/E:U/U:Green

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

The vulnerability exists due to memory allocation with excessive size value in the image handling logic when parsing a crafted PDF containing images with declared size values much larger than the actual data. A remote attacker can supply a specially crafted PDF to cause excessive memory consumption.

Remediation

Install update from vendor's website.

References

• https://github.com/py-pdf/pypdf/security/advisories/GHSA-55h5-xmcq-c37v
• https://github.com/py-pdf/pypdf/pull/3887
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-5qjq-93h5-hrgp
• https://github.com/py-pdf/pypdf/pull/3888