pypdf is a free and open-source pure-python PDF library. In versions prior to 6.10.0, manipulated XMP metadata entity declarations can exhaust RAM. An attacker who exploits this vulnerability can craft a PDF which leads to large memory usage.
This requires parsing the XMP metadata. This issue has been fixed in version 6.10.0.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/py-pdf/pypdf/commit/b15a374e5ca648d4878e57c3b2c0551e7f8cc7f8
security-advisories@github.com
https://github.com/py-pdf/pypdf/pull/3724
security-advisories@github.com
https://github.com/py-pdf/pypdf/releases/tag/6.10.0
security-advisories@github.com
https://github.com/py-pdf/pypdf/security/advisories/GHSA-3crg-w4f6-42mx
security-advisories@github.com