CVE-2021-3621 Command injection in sssd

What is CVE-2021-3621?

CVE-2021-3621 is a high-severity command injection vulnerability in Fedoraproject Fedora, published on 23 Dec 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

A flaw was found in SSSD, where the sssctl command was vulnerable to shell command injection via the logs-fetch and cache-expire subcommands. This flaw allows an attacker to trick the root user into running a specially crafted sssctl command, such as via sudo, to gain root access. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Weakness: CWE-78, CWE-77

Which versions are affected by CVE-2021-3621?

It affects 8 products.

Products include Fedoraproject Fedora, Fedoraproject Sssd, Redhat Enterprise Linux, Redhat Enterprise Linux Eus, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Tus and 2 more.

How do I fix CVE-2021-3621?

Apply the vendor's patch.

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

Is CVE-2021-3621 being exploited?

There is no known exploitation of CVE-2021-3621 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 ALSA-2021:3151, DEBIAN-CVE-2021-3621, DLA-2758-1, GHSA-g527-g4q2-57xc, MGASA-2021-0502, OESA-2021-1340 and 13 more.