CVE-2021-22879 Command injection in Nextcloud Desktop Client

What is CVE-2021-22879?

CVE-2021-22879 is a high-severity command injection vulnerability in Fedoraproject Fedora, published on 14 Apr 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands. User interaction is needed for exploitation.

Weakness: CWE-74, CWE-99

Which versions are affected by CVE-2021-22879?

It affects 2 products.

Products include Fedoraproject Fedora, Nextcloud Desktop.

How do I fix CVE-2021-22879?

Upgrade to a fixed version.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2021-22879 being exploited?

There is no known exploitation of CVE-2021-22879 in the wild and no public exploit code.

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• 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 DEBIAN-CVE-2021-22879, GHSA-vrvw-x9cv-3j76, UBUNTU-CVE-2021-22879, openSUSE-SU-2021:0577-1, openSUSE-SU-2024:11088-1.