CVE-2021-33477 Code injection in n/a
Attackers can execute arbitrary code via malicious escape sequences in vulnerable terminal emulators like rxvt-unicode and Eterm.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-33477?
CVE-2021-33477 is a high-severity code injection vulnerability in Debian Debian Linux, published on 20 May 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
rxvt-unicode 9.22, rxvt 2.7.10, mrxvt 0.5.4, and Eterm 0.9.7 allow (potentially remote) code execution because of improper handling of certain escape sequences (ESC G Q). A response is terminated by a newline.
Weakness: CWE-755
Which versions are affected by CVE-2021-33477?
It affects 6 products.
Linux distribution packages (1)
rxvt-unicode openSUSE:Tumbleweed | All versions | 9.30-2.1 |
Products include Debian Debian Linux, Eterm Project Eterm, Fedoraproject Fedora, Mrxvt Project Mrxvt, Rxvt-Unicode Project Rxvt-Unicode, Rxvt Project Rxvt.
How do I fix CVE-2021-33477?
Apply the vendor's patch.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2021-33477 being exploited?
There is no known exploitation of CVE-2021-33477 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as ALPINE-CVE-2021-33477, DEBIAN-CVE-2021-33477, DLA-2671-1, DLA-2681-1, DLA-2682-1, GHSA-vm2c-wqqr-v3gc and 3 more.