Bug 1216772 (CVE-2023-36807)

Summary: VUL-0: CVE-2023-36807: pypdf: In version 2.10.5 an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop.
Product: [openSUSE] openSUSE Distribution Reporter: SMASH SMASH <smash_bz>
Component: PythonAssignee: Simon Lees <simonf.lees>
Status: NEW --- QA Contact: Security Team bot <security-team>
Severity: Normal    
Priority: P3 - Medium CC: stoyan.manolov
Version: Leap 15.6   
Target Milestone: ---   
Hardware: Other   
OS: Other   
URL: https://smash.suse.de/issue/371003/
Whiteboard:
Found By: Security Response Team Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---

Description SMASH SMASH 2023-11-01 05:34:09 UTC 
pypdf is a pure-python PDF library capable of splitting, merging, cropping, and
transforming the pages of PDF files. In version 2.10.5 an attacker who uses this
vulnerability can craft a PDF which leads to an infinite loop. This infinite
loop blocks the current process and can utilize a single core of the CPU by
100%. It does not affect memory usage. That is, for example, the case if the
user extracted metadata from such a malformed PDF. Versions prior to 2.10.5
throw an error, but do not hang forever. This issue was fixed with
https://github.com/py-pdf/pypdf/pull/1331 which has been included in release
2.10.6. Users are advised to upgrade. Users unable to upgrade should modify
`PyPDF2/generic/_data_structures.py::read_object` to an an error throwing case.
See GHSA-hm9v-vj3r-r55m for details. 

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-36807