CVE-2020-35521 Denial of service in libtiff

What is CVE-2020-35521?

CVE-2020-35521 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 9 Mar 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

A flaw was found in libtiff. Due to a memory allocation failure in tif_read.c, a crafted TIFF file can lead to an abort, resulting in denial of service.

Weakness: CWE-119

Which versions are affected by CVE-2020-35521?

It affects 4 products.

Products include Fedoraproject Fedora, Libtiff Libtiff, Netapp Ontap Select Deploy Administration Utility, Redhat Enterprise Linux.

How do I fix CVE-2020-35521?

Apply the vendor's patch.

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-2020-35521 being exploited?

There is no known exploitation of CVE-2020-35521 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-2020-35521, AZL-6652, DEBIAN-CVE-2020-35521, GHSA-9g68-wfgw-rc4f, JLSEC-2025-255, UBUNTU-CVE-2020-35521.