CVE-2021-29421 Improper Restriction of XML External Entity Reference in pikepdf

What is CVE-2021-29421?

CVE-2021-29421 is a high-severity vulnerability in Fedoraproject Fedora, published on 1 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

models/metadata.py in the pikepdf package 1.3.0 through 2.9.2 for Python allows XXE when parsing XMP metadata entries.

Weakness: CWE-611

Which versions are affected by CVE-2021-29421?

3 open source packages ship an affected version, including pikepdf. It affects 2 products.

Products include Fedoraproject Fedora, Pikepdf Project Pikepdf.

How do I fix CVE-2021-29421?

Upgrade pikepdf to 2.10.0 or later.

Is CVE-2021-29421 being exploited?

There is no known exploitation of CVE-2021-29421 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CVE-2021-46849, DEBIAN-CVE-2021-29421, GHSA-ccgm-3xw4-h5p8, MGASA-2021-0268, PYSEC-2021-34, UBUNTU-CVE-2021-29421 and 3 more.