CVE-2019-11829 Command injection in Calendar

High 7.3 Published 30 Jun 2019 Updated 16 Sep 2024

Remote attackers can execute arbitrary commands via a crafted X-Real-IP header in Synology Calendar, requiring an upgrade to mitigate.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2019-11829?

CVE-2019-11829 is a high-severity command injection vulnerability in Synology Calendar, published on 30 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

OS command injection vulnerability in drivers_syno_import_user.php in Synology Calendar before 2.3.1-0617 allows remote attackers to execute arbitrary commands via the crafted 'X-Real-IP' header.

Weakness: CWE-78

Which versions are affected by CVE-2019-11829?

It affects 1 product.

Products include Synology Calendar.

How do I fix CVE-2019-11829?

No fix has been published for CVE-2019-11829 yet. Limit exposure of the affected software until one is available.

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

Is CVE-2019-11829 being exploited?

There is no known exploitation of CVE-2019-11829 in the wild and no public exploit code.

Sources

Also known as GHSA-2c6q-2f39-j65x.