CVE-2019-18903 wicked: Use-after-free when receiving invalid DHCP6 IA_PD option
Remote attackers can trigger a use-after-free in the wicked DHCP client, causing denial of service or potential code execution on SUSE Linux systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-18903?
CVE-2019-18903 is a high-severity use after free vulnerability in Opensuse Leap, published on 2 Mar 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A Use After Free vulnerability in wicked of SUSE Linux Enterprise Server 12, SUSE Linux Enterprise Server 15; openSUSE Leap 15.1, Factory allows remote attackers to cause DoS or potentially code execution. This issue affects: SUSE Linux Enterprise Server 12 wicked versions prior to 0.6.60-2.18.1. SUSE Linux Enterprise Server 15 wicked versions prior to 0.6.60-28.26.1. openSUSE Leap 15.1 wicked versions prior to 0.6.60-lp151.2.9.1. openSUSE Factory wicked versions prior to 0.6.62.
Weakness: CWE-416
Which versions are affected by CVE-2019-18903?
It affects 2 products.
Products include Opensuse Leap, Suse Linux Enterprise Server.
How do I fix CVE-2019-18903?
Apply the vendor's patch.
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-2019-18903 being exploited?
There is no known exploitation of CVE-2019-18903 in the wild and no public exploit code.
Other vulnerabilities in Opensuse Leap
Sources
Also known as GHSA-6gv4-2ccp-8f55.