CVE-2022-24859
Published: 18 April 2022
PyPDF2 is an open source python PDF library capable of splitting, merging, cropping, and transforming the pages of PDF files. In versions prior to 1.27.5 an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop if the PyPDF2 if the code attempts to get the content stream. The reason is that the last while-loop in `ContentStream._readInlineImage` only terminates when it finds the `EI` token, but never actually checks if the stream has already ended. This issue has been resolved in version `1.27.5`. Users unable to upgrade should validate and PDFs prior to iterating over their content stream.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
pypdf2 Launchpad, Ubuntu, Debian |
bionic |
Released
(1.26.0-2ubuntu0.1~esm1)
Available with Ubuntu Pro |
| focal |
Released
(1.26.0-3ubuntu1.20.04.1)
|
|
| impish |
Ignored
(end of life)
|
|
| jammy |
Released
(1.26.0-4ubuntu0.22.04.1)
|
|
| kinetic |
Not vulnerable
(2.10.3-1)
|
|
| lunar |
Not vulnerable
(2.12.1-3)
|
|
| trusty |
Ignored
(end of standard support)
|
|
| upstream |
Released
(1.27.5)
|
|
| xenial |
Released
(1.25.1-1ubuntu0.1~esm1)
Available with Ubuntu Pro |
|
|
Patches: upstream: https://github.com/py-pdf/pypdf/pull/740 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
References
- https://github.com/py-pdf/PyPDF2/security/advisories/GHSA-xcjx-m2pj-8g79
- https://github.com/py-pdf/PyPDF2/issues/329
- https://github.com/py-pdf/PyPDF2/pull/740
- https://github.com/py-pdf/PyPDF2/releases/tag/1.27.5
- https://ubuntu.com/security/notices/USN-6176-1
- https://www.cve.org/CVERecord?id=CVE-2022-24859
- NVD
- Launchpad
- Debian