CVE-2021-28678 Insufficient Verification of Data Authenticity in Pillow

What is CVE-2021-28678?

CVE-2021-28678 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 2 Jun 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

An issue was discovered in Pillow before 8.2.0. For BLP data, BlpImagePlugin did not properly check that reads (after jumping to file offsets) returned data. This could lead to a DoS where the decoder could be run a large number of times on empty data.

Weakness: CWE-345

Which versions are affected by CVE-2021-28678?

4 open source packages ship an affected version, including pillow and Pillow. It affects 2 products.

Products include Fedoraproject Fedora, Python Pillow.

How do I fix CVE-2021-28678?

Upgrade pillow to 8.2.0 or later.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-28678 being exploited?

There is no known exploitation of CVE-2021-28678 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 ALPINE-CVE-2021-28678, BIT-pillow-2021-28678, DEBIAN-CVE-2021-28678, GHSA-hjfx-8p6c-g7gx, PYSEC-2021-94, UBUNTU-CVE-2021-28678.