CVE-2019-16889 Denial of service in n/a
Remote attackers can cause denial of service on Ubiquiti EdgeMAX devices by exhausting disk space via crafted session cookies.
- 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-2019-16889?
CVE-2019-16889 is a high-severity denial of service vulnerability in n/a, published on 25 Sep 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Ubiquiti EdgeMAX devices before 2.0.3 allow remote attackers to cause a denial of service (disk consumption) because *.cache files in /var/run/beaker/container_file/ are created when providing a valid length payload of 249 characters or fewer to the beaker.session.id cookie in a GET header. The attacker can use a long series of unique session IDs.
Weakness: CWE-770
Which versions are affected by CVE-2019-16889?
It affects 12 products.
Products include Ui Ep-R6 Firmware, Ui Ep-R8 Firmware, Ui Er-12 Firmware, Ui Er-4 Firmware, Ui Er-6p Firmware, Ui Er-8-Xg Firmware and 6 more.
How do I fix CVE-2019-16889?
No fix has been published for CVE-2019-16889 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2019-16889 being exploited?
There is no known exploitation of CVE-2019-16889 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-qfxx-p6hh-pg3p.