CVE-2021-21796 Use after free in Nitro Pro
A use-after-free vulnerability in Nitro Pro allows attackers to execute arbitrary code by tricking users into opening a specially crafted PDF document.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-21796?
CVE-2021-21796 is a high-severity use after free vulnerability in Nitro Pro, published on 18 Oct 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
An exploitable use-after-free vulnerability exists in the JavaScript implementation of Nitro Pro PDF. A specially crafted document can cause an object containing the path to a document to be destroyed and then later reused, resulting in a use-after-free vulnerability, which can lead to code execution under the context of the application. An attacker can convince a user to open a document to trigger this vulnerability.
Weakness: CWE-416
Which versions are affected by CVE-2021-21796?
It affects 1 product.
Products include Gonitro Nitro Pro.
How do I fix CVE-2021-21796?
No fix has been published for CVE-2021-21796 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2021-21796 being exploited?
There is no known exploitation of CVE-2021-21796 in the wild and no public exploit code.
Other vulnerabilities in Nitro Pro
Sources
Also known as GHSA-xv8q-fw76-648m.